diff --git a/configure b/configure
index 6840ad20f..cc735468f 100755
--- a/configure
+++ b/configure
@@ -307,7 +307,6 @@ EXPERIMENT_LIST="
     dst1
     sr_mode
     multi_ref
-    last3_ref
     last4_ref
 "
 CONFIG_LIST="
diff --git a/vp9/common/vp9_blockd.h b/vp9/common/vp9_blockd.h
index 08084c28d..97504ee5c 100644
--- a/vp9/common/vp9_blockd.h
+++ b/vp9/common/vp9_blockd.h
@@ -68,8 +68,6 @@ extern "C" {
 
 #if CONFIG_MULTI_REF
 
-#if CONFIG_LAST3_REF
-
 #if CONFIG_LAST4_REF
 #define SINGLE_REFS 6
 #define COMP_REFS 5
@@ -78,13 +76,6 @@ extern "C" {
 #define COMP_REFS 4
 #endif  // CONFIG_LAST4_REF
 
-#else  // LAST3_REF
-
-#define SINGLE_REFS 4
-#define COMP_REFS 3
-
-#endif  // CONFIG_LAST3_REF
-
 #else  // CONFIG_MULTI_REF
 #define SINGLE_REFS 3
 #define COMP_REFS 2
@@ -232,21 +223,15 @@ typedef enum {
   LAST_FRAME = 1,
 #if CONFIG_MULTI_REF
   LAST2_FRAME = 2,
-#if CONFIG_LAST3_REF
-#if CONFIG_LAST4_REF
   LAST3_FRAME = 3,
+#if CONFIG_LAST4_REF
   LAST4_FRAME = 4,
   GOLDEN_FRAME = 5,
   ALTREF_FRAME = 6,
 #else  // CONFIG_LAST4_REF
-  LAST3_FRAME = 3,
   GOLDEN_FRAME = 4,
   ALTREF_FRAME = 5,
 #endif  // CONFIG_LAST4_REF
-#else  // CONFIG_LAST3_REF
-  GOLDEN_FRAME = 3,
-  ALTREF_FRAME = 4,
-#endif  // CONFIG_LAST3_REF
 #else  // CONFIG_MULTI_REF
   GOLDEN_FRAME = 2,
   ALTREF_FRAME = 3,
diff --git a/vp9/common/vp9_entropymode.c b/vp9/common/vp9_entropymode.c
index fd797686f..82696f259 100644
--- a/vp9/common/vp9_entropymode.c
+++ b/vp9/common/vp9_entropymode.c
@@ -419,7 +419,6 @@ static const vp9_prob default_single_ref_probs[REF_CONTEXTS][SINGLE_REFS - 1] =
 {
 #if CONFIG_MULTI_REF
   // TODO(zoeliu): To adjust the initial prob values.
-#if CONFIG_LAST3_REF
 #if CONFIG_LAST4_REF
   {  33,  16,  16,  16,  16 },
   {  77,  74,  74,  74,  74 },
@@ -433,13 +432,6 @@ static const vp9_prob default_single_ref_probs[REF_CONTEXTS][SINGLE_REFS - 1] =
   { 172, 170, 170, 170 },
   { 238, 247, 247, 247 }
 #endif  // CONFIG_LAST4_REF
-#else  // CONFIG_LAST3_REF
-  {  33,  16,  16 },
-  {  77,  74,  74 },
-  { 142, 142, 142 },
-  { 172, 170, 170 },
-  { 238, 247, 247 }
-#endif  // CONFIG_LAST3_REF
 #else  // CONFIG_MULTI_REF
   {  33,  16 },
   {  77,  74 },
@@ -452,7 +444,6 @@ static const vp9_prob default_single_ref_probs[REF_CONTEXTS][SINGLE_REFS - 1] =
 static const vp9_prob default_comp_ref_probs[REF_CONTEXTS][COMP_REFS - 1] = {
 #if CONFIG_MULTI_REF
   // TODO(zoeliu): To adjust the initial prob values.
-#if CONFIG_LAST3_REF
 #if CONFIG_LAST4_REF
   {  33,  16,  16,  16 },
   {  77,  74,  74,  74 },
@@ -466,13 +457,6 @@ static const vp9_prob default_comp_ref_probs[REF_CONTEXTS][COMP_REFS - 1] = {
   { 172, 170, 170 },
   { 238, 247, 247 }
 #endif  // CONFIG_LAST4_REF
-#else  // CONFIG_LAST3_REF
-  {  33,  16 },
-  {  77,  74 },
-  { 142, 142 },
-  { 172, 170 },
-  { 238, 247 }
-#endif  // CONFIG_LAST3_REF
 #else  // CONFIG_MULTI_REF
   { 50 }, { 126 }, { 123 }, { 221 }, { 226 }
 #endif  // CONFIG_MULTI_REF
@@ -1347,12 +1331,10 @@ static void set_default_lf_deltas(struct loopfilter *lf) {
   lf->ref_deltas[LAST_FRAME] = 0;
 #if CONFIG_MULTI_REF
   lf->ref_deltas[LAST2_FRAME] = lf->ref_deltas[LAST_FRAME];
-#if CONFIG_LAST3_REF
   lf->ref_deltas[LAST3_FRAME] = lf->ref_deltas[LAST_FRAME];
 #if CONFIG_LAST4_REF
   lf->ref_deltas[LAST4_FRAME] = lf->ref_deltas[LAST_FRAME];
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
   lf->ref_deltas[GOLDEN_FRAME] = -1;
   lf->ref_deltas[ALTREF_FRAME] = -1;
diff --git a/vp9/common/vp9_enums.h b/vp9/common/vp9_enums.h
index ff1ea9a72..46cae53f7 100644
--- a/vp9/common/vp9_enums.h
+++ b/vp9/common/vp9_enums.h
@@ -196,7 +196,6 @@ typedef enum {
   VP9_LAST_FLAG = 1 << 0,
 #if CONFIG_MULTI_REF
   VP9_LAST2_FLAG = 1 << 1,
-#if CONFIG_LAST3_REF
   VP9_LAST3_FLAG = 1 << 2,
 #if CONFIG_LAST4_REF
   VP9_LAST4_FLAG = 1 << 3,
@@ -206,10 +205,6 @@ typedef enum {
   VP9_GOLD_FLAG = 1 << 3,
   VP9_ALT_FLAG = 1 << 4,
 #endif  // CONFIG_LAST4_REF
-#else  // CONFIG_LAST3_REF
-  VP9_GOLD_FLAG = 1 << 2,
-  VP9_ALT_FLAG = 1 << 3,
-#endif  // CONFIG_LAST3_REF
 #else  // CONFIG_MULTI_REF
   VP9_GOLD_FLAG = 1 << 1,
   VP9_ALT_FLAG = 1 << 2,
diff --git a/vp9/common/vp9_loopfilter.h b/vp9/common/vp9_loopfilter.h
index b45408841..ae6e24b37 100644
--- a/vp9/common/vp9_loopfilter.h
+++ b/vp9/common/vp9_loopfilter.h
@@ -27,15 +27,11 @@ extern "C" {
 #define SIMD_WIDTH 16
 
 #if CONFIG_MULTI_REF
-#if CONFIG_LAST3_REF
 #if CONFIG_LAST4_REF
 #define MAX_REF_LF_DELTAS       7
 #else  // CONFIG_LAST4_REF
 #define MAX_REF_LF_DELTAS       6
 #endif  // CONFIG_LAST4_REF
-#else  // CONFIG_LAST3_REF
-#define MAX_REF_LF_DELTAS       5
-#endif  // CONFIG_LAST3_REF
 #else  // CONFIG_MULTI_REF
 #define MAX_REF_LF_DELTAS       4
 #endif  // CONFIG_MULTI_REF
@@ -116,8 +112,7 @@ struct loopfilter {
   uint8_t mode_ref_delta_enabled;
   uint8_t mode_ref_delta_update;
 
-  // 0 = Intra, Last, Last2(CONFIG_MULTI_REF),
-  // Last3(CONFIG_LAST3_REF),
+  // 0 = Intra, Last, Last2+Last3(CONFIG_MULTI_REF),
   // Last4(CONFIG_LAST4_REF),
   // GF, ARF
   signed char ref_deltas[MAX_REF_LF_DELTAS];
diff --git a/vp9/common/vp9_onyxc_int.h b/vp9/common/vp9_onyxc_int.h
index 705c8d16f..581a5b372 100644
--- a/vp9/common/vp9_onyxc_int.h
+++ b/vp9/common/vp9_onyxc_int.h
@@ -31,15 +31,11 @@ extern "C" {
 #endif
 
 #if CONFIG_MULTI_REF
-#if CONFIG_LAST3_REF
 #if CONFIG_LAST4_REF
 #define REFS_PER_FRAME 6
 #else  // CONFIG_LAST4_REF
 #define REFS_PER_FRAME 5
 #endif  // CONFIG_LAST4_REF
-#else  // CONFIG_LAST3_REF
-#define REFS_PER_FRAME 4
-#endif  // CONFIG_LAST3_REF
 #else  // CONFIG_MULTI_REF
 #define REFS_PER_FRAME 3
 #endif  // CONFIG_MULTI_REF
@@ -137,14 +133,14 @@ typedef struct VP9Common {
 
   FRAME_TYPE last_frame_type;  /* last frame's frame type for motion search.*/
   FRAME_TYPE frame_type;
-#if CONFIG_MULTI_REF && CONFIG_LAST3_REF
+#if CONFIG_MULTI_REF
   // frame type for the frame before the last
   FRAME_TYPE last2_frame_type;
 #if CONFIG_LAST4_REF
   // frame type for the frame two frames before the last
   FRAME_TYPE last3_frame_type;
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_MULTI_REF && CONFIG_LAST3_REF
+#endif  // CONFIG_MULTI_REF
 
   int show_frame;
   int last_show_frame;
@@ -206,15 +202,11 @@ typedef struct VP9Common {
   int allow_comp_inter_inter;
   MV_REFERENCE_FRAME comp_fixed_ref;
 #if CONFIG_MULTI_REF
-#if CONFIG_LAST3_REF
 #if CONFIG_LAST4_REF
   MV_REFERENCE_FRAME comp_var_ref[5];
 #else  // CONFIG_LAST4_REF
   MV_REFERENCE_FRAME comp_var_ref[4];
 #endif  // CONFIG_LAST4_REF
-#else  // CONFIG_LAST3_REF
-  MV_REFERENCE_FRAME comp_var_ref[3];
-#endif  // CONFIG_LAST3_REF
 #else  // CONFIG_MULTI_REF
   MV_REFERENCE_FRAME comp_var_ref[2];
 #endif  // CONFIG_MULTI_REF
diff --git a/vp9/common/vp9_pred_common.c b/vp9/common/vp9_pred_common.c
index 9d4a540b1..69755e023 100644
--- a/vp9/common/vp9_pred_common.c
+++ b/vp9/common/vp9_pred_common.c
@@ -114,8 +114,6 @@ int vp9_get_reference_mode_context(const VP9_COMMON *cm,
 #define CHECK_LAST_OR_LAST2(ref_frame) \
   ((ref_frame == LAST_FRAME) || (ref_frame == LAST2_FRAME))
 
-#if CONFIG_LAST3_REF
-
 #define CHECK_GOLDEN_OR_LAST3(ref_frame) \
   ((ref_frame == GOLDEN_FRAME) || (ref_frame == LAST3_FRAME))
 
@@ -824,193 +822,6 @@ int vp9_get_pred_context_comp_ref_p2(const VP9_COMMON *cm,
 
 #endif  // CONFIG_LAST4_REF
 
-#else  // CONFIG_LAST3_REF
-
-// Returns a context number for the given MB prediction signal
-// Signal the first reference frame for a compound mode is GOLDEN.
-int vp9_get_pred_context_comp_ref_p(const VP9_COMMON *cm,
-                                    const MACROBLOCKD *xd) {
-  int pred_context;
-  const MB_MODE_INFO *const above_mbmi = get_mbmi(get_above_mi(xd));
-  const MB_MODE_INFO *const left_mbmi = get_mbmi(get_left_mi(xd));
-  const int above_in_image = above_mbmi != NULL;
-  const int left_in_image = left_mbmi != NULL;
-
-  // Note:
-  // The mode info data structure has a one element border above and to the
-  // left of the entries correpsonding to real macroblocks.
-  // The prediction flags in these dummy entries are initialised to 0.
-  const int fix_ref_idx = cm->ref_frame_sign_bias[cm->comp_fixed_ref];
-  const int var_ref_idx = !fix_ref_idx;
-
-  if (above_in_image && left_in_image) {  // both edges available
-    const int above_intra = !is_inter_block(above_mbmi);
-    const int left_intra = !is_inter_block(left_mbmi);
-
-    if (above_intra && left_intra) {  // intra/intra (2)
-      pred_context = 2;
-    } else if (above_intra || left_intra) {  // intra/inter
-      const MB_MODE_INFO *edge_mbmi = above_intra ? left_mbmi : above_mbmi;
-
-      if (!has_second_ref(edge_mbmi))  // single pred (1/3)
-        pred_context = 1 + 2 * (edge_mbmi->ref_frame[0] != GOLDEN_FRAME);
-      else  // comp pred (1/3)
-        pred_context = 1 + 2 * (edge_mbmi->ref_frame[var_ref_idx]
-                                != GOLDEN_FRAME);
-    } else {  // inter/inter
-      const int l_sg = !has_second_ref(left_mbmi);
-      const int a_sg = !has_second_ref(above_mbmi);
-      const MV_REFERENCE_FRAME vrfa = a_sg ? above_mbmi->ref_frame[0]
-                                           : above_mbmi->ref_frame[var_ref_idx];
-      const MV_REFERENCE_FRAME vrfl = l_sg ? left_mbmi->ref_frame[0]
-                                           : left_mbmi->ref_frame[var_ref_idx];
-
-      if (vrfa == vrfl && vrfa == GOLDEN_FRAME) {
-        pred_context = 0;
-      } else if (l_sg && a_sg) {  // single/single
-        if ((vrfa == ALTREF_FRAME && CHECK_LAST_OR_LAST2(vrfl)) ||
-            (vrfl == ALTREF_FRAME && CHECK_LAST_OR_LAST2(vrfa))) {
-          pred_context = 4;
-        } else if (vrfa == vrfl || (CHECK_LAST_OR_LAST2(vrfa) &&
-                                    CHECK_LAST_OR_LAST2(vrfl))) {
-          pred_context = 3;
-        } else {  // either vrfa or vrfl == GOLDEN_FRAME
-          // NOTE(zoeliu): Following assert may be removed once confirmed.
-          assert(vrfa == GOLDEN_FRAME || vrfl == GOLDEN_FRAME);
-          pred_context = 1;
-        }
-      } else if (l_sg || a_sg) {  // single/comp
-        const MV_REFERENCE_FRAME vrfc = l_sg ? vrfa : vrfl;
-        const MV_REFERENCE_FRAME rfs = a_sg ? vrfa : vrfl;
-
-        if (vrfc == GOLDEN_FRAME && rfs != GOLDEN_FRAME)
-          pred_context = 1;
-        else if (rfs == GOLDEN_FRAME && vrfc != GOLDEN_FRAME)
-          pred_context = 2;
-        else
-          pred_context = 4;
-      } else {  // comp/comp
-        if ((CHECK_LAST_OR_LAST2(vrfa) && CHECK_LAST_OR_LAST2(vrfl))) {
-          pred_context = 4;
-        } else {
-          // NOTE(zoeliu): Following assert may be removed once confirmed.
-          assert(vrfa == GOLDEN_FRAME || vrfl == GOLDEN_FRAME);
-          pred_context = 2;
-        }
-      }
-    }
-  } else if (above_in_image || left_in_image) {  // one edge available
-    const MB_MODE_INFO *edge_mbmi = above_in_image ? above_mbmi : left_mbmi;
-
-    if (!is_inter_block(edge_mbmi)) {
-      pred_context = 2;
-    } else {
-      if (has_second_ref(edge_mbmi))
-        pred_context = 4 * (edge_mbmi->ref_frame[var_ref_idx] != GOLDEN_FRAME);
-      else
-        pred_context = 3 * (edge_mbmi->ref_frame[0] != GOLDEN_FRAME);
-    }
-  } else {  // no edges available (2)
-    pred_context = 2;
-  }
-  assert(pred_context >= 0 && pred_context < REF_CONTEXTS);
-
-  return pred_context;
-}
-
-// Returns a context number for the given MB prediction signal
-// Signal the first reference frame for a compound mode is LAST,
-// conditioning on that it is known not GOLDEN.
-int vp9_get_pred_context_comp_ref_p1(const VP9_COMMON *cm,
-                                     const MACROBLOCKD *xd) {
-  int pred_context;
-  const MB_MODE_INFO *const above_mbmi = get_mbmi(get_above_mi(xd));
-  const MB_MODE_INFO *const left_mbmi = get_mbmi(get_left_mi(xd));
-  const int above_in_image = above_mbmi != NULL;
-  const int left_in_image = left_mbmi != NULL;
-
-  // Note:
-  // The mode info data structure has a one element border above and to the
-  // left of the entries correpsonding to real macroblocks.
-  // The prediction flags in these dummy entries are initialised to 0.
-  const int fix_ref_idx = cm->ref_frame_sign_bias[cm->comp_fixed_ref];
-  const int var_ref_idx = !fix_ref_idx;
-
-  if (above_in_image && left_in_image) {  // both edges available
-    const int above_intra = !is_inter_block(above_mbmi);
-    const int left_intra = !is_inter_block(left_mbmi);
-
-    if (above_intra && left_intra) {  // intra/intra (2)
-      pred_context = 2;
-    } else if (above_intra || left_intra) {  // intra/inter
-      const MB_MODE_INFO *edge_mbmi = above_intra ? left_mbmi : above_mbmi;
-
-      if (!has_second_ref(edge_mbmi))  // single pred (1/3)
-        pred_context = 1 + 2 * (edge_mbmi->ref_frame[0] != LAST_FRAME);
-      else  // comp pred (1/3)
-        pred_context = 1 + 2 * (edge_mbmi->ref_frame[var_ref_idx]
-                                != LAST_FRAME);
-    } else {  // inter/inter
-      const int l_sg = !has_second_ref(left_mbmi);
-      const int a_sg = !has_second_ref(above_mbmi);
-      const MV_REFERENCE_FRAME vrfa = a_sg ? above_mbmi->ref_frame[0]
-                                           : above_mbmi->ref_frame[var_ref_idx];
-      const MV_REFERENCE_FRAME vrfl = l_sg ? left_mbmi->ref_frame[0]
-                                           : left_mbmi->ref_frame[var_ref_idx];
-
-      if (vrfa == vrfl && vrfa == LAST_FRAME)
-        pred_context = 0;
-      else if (l_sg && a_sg) {  // single/single
-        if (vrfa == LAST_FRAME || vrfl == LAST_FRAME)
-          pred_context = 1;
-        else if (vrfa == GOLDEN_FRAME || vrfl == GOLDEN_FRAME)
-          pred_context = 2 + (vrfa != vrfl);
-        else if (vrfa == vrfl)
-          pred_context = 3;
-        else
-          pred_context = 4;
-      } else if (l_sg || a_sg) {  // single/comp
-        const MV_REFERENCE_FRAME vrfc = l_sg ? vrfa : vrfl;
-        const MV_REFERENCE_FRAME rfs = a_sg ? vrfa : vrfl;
-
-        if (vrfc == LAST_FRAME && rfs != LAST_FRAME)
-          pred_context = 1;
-        else if (rfs == LAST_FRAME && vrfc != LAST_FRAME)
-          pred_context = 2;
-        else
-          pred_context = 3 + (vrfc == LAST2_FRAME || rfs != GOLDEN_FRAME);
-      } else {  // comp/comp
-        if (vrfa == LAST_FRAME || vrfl == LAST_FRAME)
-          pred_context = 2;
-        else
-          pred_context = 3 + (vrfa != GOLDEN_FRAME || vrfl != GOLDEN_FRAME);
-      }
-    }
-  } else if (above_in_image || left_in_image) {  // one edge available
-    const MB_MODE_INFO *edge_mbmi = above_in_image ? above_mbmi : left_mbmi;
-
-    if (!is_inter_block(edge_mbmi)) {
-      pred_context = 2;
-    } else {
-      if (has_second_ref(edge_mbmi)) {
-        pred_context = 4 * (edge_mbmi->ref_frame[var_ref_idx] != LAST_FRAME);
-      } else {
-        if (edge_mbmi->ref_frame[0] == LAST_FRAME)
-          pred_context = 0;
-        else
-          pred_context = 2 + (edge_mbmi->ref_frame[0] != GOLDEN_FRAME);
-      }
-    }
-  } else {  // no edges available (2)
-    pred_context = 2;
-  }
-  assert(pred_context >= 0 && pred_context < REF_CONTEXTS);
-
-  return pred_context;
-}
-
-#endif  // CONFIG_LAST3_REF
-
 #else  // CONFIG_MULTI_REF
 
 // Returns a context number for the given MB prediction signal
@@ -1100,17 +911,15 @@ int vp9_get_pred_context_comp_ref_p(const VP9_COMMON *cm,
 
 #if CONFIG_MULTI_REF
 
-#if CONFIG_LAST3_REF
-
 #define CHECK_LAST_LAST2_LAST3(ref_frame) \
   ((ref_frame == LAST_FRAME) || (ref_frame == LAST2_FRAME) || \
   (ref_frame == LAST3_FRAME))
 
-#if CONFIG_LAST4_REF
-
 #define CHECK_GOLDEN_OR_ALTREF(ref_frame) \
   ((ref_frame == GOLDEN_FRAME) || (ref_frame == ALTREF_FRAME))
 
+#if CONFIG_LAST4_REF
+
 // For the bit to signal whether the single reference is a ALTREF_FRAME
 // or a GOLDEN_FRAME.
 //
@@ -1746,9 +1555,6 @@ int vp9_get_pred_context_single_ref_p2(const MACROBLOCKD *xd) {
   return pred_context;
 }
 
-#define CHECK_GOLDEN_OR_ALTREF(ref_frame) \
-  ((ref_frame == GOLDEN_FRAME) || (ref_frame == ALTREF_FRAME))
-
 // For the bit to signal whether the single reference is LAST3_FRAME or
 // LAST_FRAME/LAST2_FRAME, knowing that it shall be either of these 2 choices.
 //
@@ -1946,267 +1752,6 @@ int vp9_get_pred_context_single_ref_p4(const MACROBLOCKD *xd) {
 
 #endif  // CONFIG_LAST4_REF
 
-#else  // CONFIG_LAST3_REF
-
-// For the bit to signal whether the single reference is a LAST_FRAME/
-// LAST2_FRAME, or not.
-int vp9_get_pred_context_single_ref_p1(const MACROBLOCKD *xd) {
-  int pred_context;
-  const MB_MODE_INFO *const above_mbmi = get_mbmi(get_above_mi(xd));
-  const MB_MODE_INFO *const left_mbmi = get_mbmi(get_left_mi(xd));
-  const int has_above = above_mbmi != NULL;
-  const int has_left = left_mbmi != NULL;
-
-  // Note:
-  // The mode info data structure has a one element border above and to the
-  // left of the entries correpsonding to real macroblocks.
-  // The prediction flags in these dummy entries are initialised to 0.
-  if (has_above && has_left) {  // both edges available
-    const int above_intra = !is_inter_block(above_mbmi);
-    const int left_intra = !is_inter_block(left_mbmi);
-
-    if (above_intra && left_intra) {  // intra/intra
-      pred_context = 2;
-    } else if (above_intra || left_intra) {  // intra/inter or inter/intra
-      const MB_MODE_INFO *edge_mbmi = above_intra ? left_mbmi : above_mbmi;
-      if (!has_second_ref(edge_mbmi))
-        pred_context = 4 * CHECK_LAST_OR_LAST2(edge_mbmi->ref_frame[0]);
-      else
-        pred_context = 1 + (CHECK_LAST_OR_LAST2(edge_mbmi->ref_frame[0]) ||
-                            CHECK_LAST_OR_LAST2(edge_mbmi->ref_frame[1]));
-    } else {  // inter/inter
-      const int above_has_second = has_second_ref(above_mbmi);
-      const int left_has_second  = has_second_ref(left_mbmi);
-      const MV_REFERENCE_FRAME above0 = above_mbmi->ref_frame[0];
-      const MV_REFERENCE_FRAME above1 = above_mbmi->ref_frame[1];
-      const MV_REFERENCE_FRAME left0 = left_mbmi->ref_frame[0];
-      const MV_REFERENCE_FRAME left1 = left_mbmi->ref_frame[1];
-
-      if (above_has_second && left_has_second) {
-        pred_context = 1 + (CHECK_LAST_OR_LAST2(above0) ||
-                            CHECK_LAST_OR_LAST2(above1) ||
-                            CHECK_LAST_OR_LAST2(left0) ||
-                            CHECK_LAST_OR_LAST2(left1));
-      } else if (above_has_second || left_has_second) {
-        const MV_REFERENCE_FRAME rfs = !above_has_second ? above0 : left0;
-        const MV_REFERENCE_FRAME crf1 = above_has_second ? above0 : left0;
-        const MV_REFERENCE_FRAME crf2 = above_has_second ? above1 : left1;
-
-        if (CHECK_LAST_OR_LAST2(rfs))
-          pred_context = 3 + (CHECK_LAST_OR_LAST2(crf1) ||
-                              CHECK_LAST_OR_LAST2(crf2));
-        else
-          pred_context = CHECK_LAST_OR_LAST2(crf1) || CHECK_LAST_OR_LAST2(crf2);
-      } else {
-        pred_context = 2 * CHECK_LAST_OR_LAST2(above0) +
-                       2 * CHECK_LAST_OR_LAST2(left0);
-      }
-    }
-  } else if (has_above || has_left) {  // one edge available
-    const MB_MODE_INFO *edge_mbmi = has_above ? above_mbmi : left_mbmi;
-    if (!is_inter_block(edge_mbmi)) {  // intra
-      pred_context = 2;
-    } else {  // inter
-      if (!has_second_ref(edge_mbmi))
-        pred_context = 4 * CHECK_LAST_OR_LAST2(edge_mbmi->ref_frame[0]);
-      else
-        pred_context = 1 + (CHECK_LAST_OR_LAST2(edge_mbmi->ref_frame[0]) ||
-                            CHECK_LAST_OR_LAST2(edge_mbmi->ref_frame[1]));
-    }
-  } else {  // no edges available
-    pred_context = 2;
-  }
-
-  assert(pred_context >= 0 && pred_context < REF_CONTEXTS);
-  return pred_context;
-}
-
-// For the bit to signal whether the single reference is a LAST_FRAME or a
-// LAST2_FRAME, knowing that it shall be either of these 2 choices.
-int vp9_get_pred_context_single_ref_p2(const MACROBLOCKD *xd) {
-  int pred_context;
-  const MB_MODE_INFO *const above_mbmi = get_mbmi(get_above_mi(xd));
-  const MB_MODE_INFO *const left_mbmi = get_mbmi(get_left_mi(xd));
-  const int has_above = above_mbmi != NULL;
-  const int has_left = left_mbmi != NULL;
-
-  // Note:
-  // The mode info data structure has a one element border above and to the
-  // left of the entries correpsonding to real macroblocks.
-  // The prediction flags in these dummy entries are initialised to 0.
-  if (has_above && has_left) {  // both edges available
-    const int above_intra = !is_inter_block(above_mbmi);
-    const int left_intra = !is_inter_block(left_mbmi);
-
-    if (above_intra && left_intra) {  // intra/intra
-      pred_context = 2;
-    } else if (above_intra || left_intra) {  // intra/inter or inter/intra
-      const MB_MODE_INFO *edge_mbmi = above_intra ? left_mbmi : above_mbmi;
-      if (!has_second_ref(edge_mbmi)) {
-        if (CHECK_LAST_OR_LAST2(edge_mbmi->ref_frame[0]))
-          pred_context = 3;
-        else
-          pred_context = 4 * (edge_mbmi->ref_frame[0] == GOLDEN_FRAME);
-      } else {
-        pred_context = 1 + 2 * (edge_mbmi->ref_frame[0] == GOLDEN_FRAME ||
-                                edge_mbmi->ref_frame[1] == GOLDEN_FRAME);
-      }
-    } else {  // inter/inter
-      const int above_has_second = has_second_ref(above_mbmi);
-      const int left_has_second  = has_second_ref(left_mbmi);
-      const MV_REFERENCE_FRAME above0 = above_mbmi->ref_frame[0];
-      const MV_REFERENCE_FRAME above1 = above_mbmi->ref_frame[1];
-      const MV_REFERENCE_FRAME left0 = left_mbmi->ref_frame[0];
-      const MV_REFERENCE_FRAME left1 = left_mbmi->ref_frame[1];
-
-      if (above_has_second && left_has_second) {
-        if (above0 == left0 && above1 == left1)
-          pred_context = 3 * (above0 == GOLDEN_FRAME ||
-                              above1 == GOLDEN_FRAME ||
-                              left0 == GOLDEN_FRAME ||
-                              left1 == GOLDEN_FRAME);
-        else
-          pred_context = 2;
-      } else if (above_has_second || left_has_second) {
-        const MV_REFERENCE_FRAME rfs = !above_has_second ? above0 : left0;
-        const MV_REFERENCE_FRAME crf1 = above_has_second ? above0 : left0;
-        const MV_REFERENCE_FRAME crf2 = above_has_second ? above1 : left1;
-
-        if (rfs == GOLDEN_FRAME)
-          pred_context = 3 + (crf1 == GOLDEN_FRAME || crf2 == GOLDEN_FRAME);
-        else if (rfs == ALTREF_FRAME)
-          pred_context = (crf1 == GOLDEN_FRAME || crf2 == GOLDEN_FRAME);
-        else
-          pred_context = 1 + 2 * (crf1 == GOLDEN_FRAME || crf2 == GOLDEN_FRAME);
-      } else {
-        if (CHECK_LAST_OR_LAST2(above0) && CHECK_LAST_OR_LAST2(left0)) {
-          pred_context = 2 + (above0 == left0);
-        } else if (CHECK_LAST_OR_LAST2(above0) || CHECK_LAST_OR_LAST2(left0)) {
-          const MV_REFERENCE_FRAME edge0 = CHECK_LAST_OR_LAST2(above0) ? left0
-                                                                       : above0;
-          pred_context = 4 * (edge0 == GOLDEN_FRAME);
-        } else {
-          pred_context = 2 * (above0 == GOLDEN_FRAME) +
-                         2 * (left0  == GOLDEN_FRAME);
-        }
-      }
-    }
-  } else if (has_above || has_left) {  // one edge available
-    const MB_MODE_INFO *edge_mbmi = has_above ? above_mbmi : left_mbmi;
-
-    if (!is_inter_block(edge_mbmi) ||
-        (CHECK_LAST_OR_LAST2(edge_mbmi->ref_frame[0]) &&
-         !has_second_ref(edge_mbmi)))
-      pred_context = 2;
-    else if (!has_second_ref(edge_mbmi))
-      pred_context = 4 * (edge_mbmi->ref_frame[0] == GOLDEN_FRAME);
-    else
-      pred_context = 3 * (edge_mbmi->ref_frame[0] == GOLDEN_FRAME ||
-                          edge_mbmi->ref_frame[1] == GOLDEN_FRAME);
-  } else {  // no edges available (2)
-    pred_context = 2;
-  }
-
-  assert(pred_context >= 0 && pred_context < REF_CONTEXTS);
-  return pred_context;
-}
-
-#define CHECK_GOLDEN_OR_ALTREF(ref_frame) \
-  ((ref_frame == GOLDEN_FRAME) || (ref_frame == ALTREF_FRAME))
-
-// For the bit to signal whether the single reference is a GOLDEN_FRAME or an
-// ALTREF_FRAME, knowing that it shall be either of these 2 choices.
-int vp9_get_pred_context_single_ref_p3(const MACROBLOCKD *xd) {
-  int pred_context;
-  const MB_MODE_INFO *const above_mbmi = get_mbmi(get_above_mi(xd));
-  const MB_MODE_INFO *const left_mbmi = get_mbmi(get_left_mi(xd));
-  const int has_above = above_mbmi != NULL;
-  const int has_left = left_mbmi != NULL;
-
-  // Note:
-  // The mode info data structure has a one element border above and to the
-  // left of the entries correpsonding to real macroblocks.
-  // The prediction flags in these dummy entries are initialised to 0.
-  if (has_above && has_left) {  // both edges available
-    const int above_intra = !is_inter_block(above_mbmi);
-    const int left_intra = !is_inter_block(left_mbmi);
-
-    if (above_intra && left_intra) {  // intra/intra
-      pred_context = 2;
-    } else if (above_intra || left_intra) {  // intra/inter or inter/intra
-      const MB_MODE_INFO *edge_mbmi = above_intra ? left_mbmi : above_mbmi;
-      if (!has_second_ref(edge_mbmi)) {
-        if (CHECK_GOLDEN_OR_ALTREF(edge_mbmi->ref_frame[0]))
-          pred_context = 3;
-        else
-          pred_context = 4 * (edge_mbmi->ref_frame[0] == LAST_FRAME);
-      } else {
-        pred_context = 1 + 2 * (edge_mbmi->ref_frame[0] == LAST_FRAME ||
-                                edge_mbmi->ref_frame[1] == LAST_FRAME);
-      }
-    } else {  // inter/inter
-      const int above_has_second = has_second_ref(above_mbmi);
-      const int left_has_second  = has_second_ref(left_mbmi);
-      const MV_REFERENCE_FRAME above0 = above_mbmi->ref_frame[0];
-      const MV_REFERENCE_FRAME above1 = above_mbmi->ref_frame[1];
-      const MV_REFERENCE_FRAME left0 = left_mbmi->ref_frame[0];
-      const MV_REFERENCE_FRAME left1 = left_mbmi->ref_frame[1];
-
-      if (above_has_second && left_has_second) {
-        if (above0 == left0 && above1 == left1)
-          pred_context = 3 * (above0 == LAST_FRAME ||
-                              above1 == LAST_FRAME ||
-                              left0 == LAST_FRAME ||
-                              left1 == LAST_FRAME);
-        else
-          pred_context = 2;
-      } else if (above_has_second || left_has_second) {
-        const MV_REFERENCE_FRAME rfs = !above_has_second ? above0 : left0;
-        const MV_REFERENCE_FRAME crf1 = above_has_second ? above0 : left0;
-        const MV_REFERENCE_FRAME crf2 = above_has_second ? above1 : left1;
-
-        if (rfs == LAST_FRAME)
-          pred_context = 3 + (crf1 == LAST_FRAME || crf2 == LAST_FRAME);
-        else if (rfs == LAST2_FRAME)
-          pred_context = (crf1 == LAST_FRAME || crf2 == LAST_FRAME);
-        else
-          pred_context = 1 + 2 * (crf1 == LAST_FRAME || crf2 == LAST_FRAME);
-      } else {
-        if (CHECK_GOLDEN_OR_ALTREF(above0) && CHECK_GOLDEN_OR_ALTREF(left0)) {
-          pred_context = 2 + (above0 == left0);
-        } else if (CHECK_GOLDEN_OR_ALTREF(above0) ||
-                   CHECK_GOLDEN_OR_ALTREF(left0)) {
-          const MV_REFERENCE_FRAME edge0 =
-              CHECK_GOLDEN_OR_ALTREF(above0) ? left0 : above0;
-          pred_context = 4 * (edge0 == LAST_FRAME);
-        } else {
-          pred_context = 2 * (above0 == LAST_FRAME) +
-                         2 * (left0  == LAST_FRAME);
-        }
-      }
-    }
-  } else if (has_above || has_left) {  // one edge available
-    const MB_MODE_INFO *edge_mbmi = has_above ? above_mbmi : left_mbmi;
-
-    if (!is_inter_block(edge_mbmi) ||
-        (CHECK_GOLDEN_OR_ALTREF(edge_mbmi->ref_frame[0]) &&
-         !has_second_ref(edge_mbmi)))
-      pred_context = 2;
-    else if (!has_second_ref(edge_mbmi))
-      pred_context = 4 * (edge_mbmi->ref_frame[0] == LAST_FRAME);
-    else
-      pred_context = 3 * (edge_mbmi->ref_frame[0] == LAST_FRAME ||
-                          edge_mbmi->ref_frame[1] == LAST_FRAME);
-  } else {  // no edges available (2)
-    pred_context = 2;
-  }
-
-  assert(pred_context >= 0 && pred_context < REF_CONTEXTS);
-  return pred_context;
-}
-
-#endif  // CONFIG_LAST3_REF
-
 #else  // CONFIG_MULTI_REF
 
 int vp9_get_pred_context_single_ref_p1(const MACROBLOCKD *xd) {
diff --git a/vp9/common/vp9_pred_common.h b/vp9/common/vp9_pred_common.h
index 0e0f864cb..903cee015 100644
--- a/vp9/common/vp9_pred_common.h
+++ b/vp9/common/vp9_pred_common.h
@@ -140,7 +140,6 @@ static INLINE vp9_prob vp9_get_pred_prob_comp_ref_p1(const VP9_COMMON *cm,
   return cm->fc.comp_ref_probs[pred_context][1];
 }
 
-#if CONFIG_LAST3_REF
 int vp9_get_pred_context_comp_ref_p2(const VP9_COMMON *cm,
                                      const MACROBLOCKD *xd);
 
@@ -160,7 +159,6 @@ static INLINE vp9_prob vp9_get_pred_prob_comp_ref_p3(const VP9_COMMON *cm,
   return cm->fc.comp_ref_probs[pred_context][3];
 }
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
 
 int vp9_get_pred_context_single_ref_p1(const MACROBLOCKD *xd);
@@ -185,7 +183,6 @@ static INLINE vp9_prob vp9_get_pred_prob_single_ref_p3(const VP9_COMMON *cm,
   return cm->fc.single_ref_probs[vp9_get_pred_context_single_ref_p3(xd)][2];
 }
 
-#if CONFIG_LAST3_REF
 int vp9_get_pred_context_single_ref_p4(const MACROBLOCKD *xd);
 
 static INLINE vp9_prob vp9_get_pred_prob_single_ref_p4(const VP9_COMMON *cm,
@@ -201,7 +198,6 @@ static INLINE vp9_prob vp9_get_pred_prob_single_ref_p5(const VP9_COMMON *cm,
   return cm->fc.single_ref_probs[vp9_get_pred_context_single_ref_p5(xd)][4];
 }
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
 
 int vp9_get_tx_size_context(const MACROBLOCKD *xd);
diff --git a/vp9/decoder/vp9_decodeframe.c b/vp9/decoder/vp9_decodeframe.c
index cf194dd3a..a1f9e7199 100644
--- a/vp9/decoder/vp9_decodeframe.c
+++ b/vp9/decoder/vp9_decodeframe.c
@@ -61,7 +61,6 @@ static void setup_compound_reference_mode(VP9_COMMON *cm) {
     cm->comp_var_ref[0] = LAST_FRAME;
 #if CONFIG_MULTI_REF
     cm->comp_var_ref[1] = LAST2_FRAME;
-#if CONFIG_LAST3_REF
     cm->comp_var_ref[2] = LAST3_FRAME;
 #if CONFIG_LAST4_REF
     cm->comp_var_ref[3] = LAST4_FRAME;
@@ -69,9 +68,6 @@ static void setup_compound_reference_mode(VP9_COMMON *cm) {
 #else  // CONFIG_LAST4_REF
     cm->comp_var_ref[3] = GOLDEN_FRAME;
 #endif  // CONFIG_LAST4_REF
-#else  // CONFIG_LAST3_REF
-    cm->comp_var_ref[2] = GOLDEN_FRAME;
-#endif  // CONFIG_LAST3_REF
 #else  // CONFIG_MULTI_REF
     cm->comp_var_ref[1] = GOLDEN_FRAME;
 #endif  // CONFIG_MULTI_REF
@@ -3107,12 +3103,12 @@ static size_t read_uncompressed_header(VP9Decoder *pbi,
   size_t sz;
   int i;
 
-#if CONFIG_MULTI_REF && CONFIG_LAST3_REF
+#if CONFIG_MULTI_REF
 #if CONFIG_LAST4_REF
   cm->last3_frame_type = cm->last2_frame_type;
 #endif  // CONFIG_LAST4_REF
   cm->last2_frame_type = cm->last_frame_type;
-#endif  // CONFIG_MULTI_REF && CONFIG_LAST3_REF
+#endif  // CONFIG_MULTI_REF
   cm->last_frame_type = cm->frame_type;
 
   if (vp9_rb_read_literal(rb, 2) != VP9_FRAME_MARKER)
diff --git a/vp9/decoder/vp9_decodemv.c b/vp9/decoder/vp9_decodemv.c
index da9ad1f68..dc1b80ea7 100644
--- a/vp9/decoder/vp9_decodemv.c
+++ b/vp9/decoder/vp9_decodemv.c
@@ -784,7 +784,6 @@ static void read_ref_frames(VP9_COMMON *const cm, MACROBLOCKD *const xd,
 
         ref_frame[!idx] = cm->comp_var_ref[bit1 ? 0 : 1];
       } else {
-#if CONFIG_LAST3_REF
         const int ctx2 = vp9_get_pred_context_comp_ref_p2(cm, xd);
         const int bit2 = vp9_read(r, fc->comp_ref_probs[ctx2][2]);
 
@@ -806,9 +805,6 @@ static void read_ref_frames(VP9_COMMON *const cm, MACROBLOCKD *const xd,
 #else  // CONFIG_LAST4_REF
         ref_frame[!idx] = cm->comp_var_ref[bit2 ? 3 : 2];
 #endif  // CONFIG_LAST4_REF
-#else  // CONFIG_LAST3_REF
-        ref_frame[!idx] = cm->comp_var_ref[2];
-#endif  // CONFIG_LAST3_REF
       }
 #else  // CONFIG_MULTI_REF
       ref_frame[!idx] = cm->comp_var_ref[bit];
@@ -836,7 +832,6 @@ static void read_ref_frames(VP9_COMMON *const cm, MACROBLOCKD *const xd,
         if (!cm->frame_parallel_decoding_mode)
           ++counts->single_ref[ctx2][2][bit2];
 
-#if CONFIG_LAST3_REF
         if (bit2) {
 #if CONFIG_LAST4_REF
           const int ctx4 = vp9_get_pred_context_single_ref_p5(xd);
@@ -858,9 +853,6 @@ static void read_ref_frames(VP9_COMMON *const cm, MACROBLOCKD *const xd,
 
           ref_frame[0] = bit3 ? LAST2_FRAME : LAST_FRAME;
         }
-#else  // CONFIG_LAST3_REF
-        ref_frame[0] = bit2 ? LAST2_FRAME : LAST_FRAME;
-#endif  // CONFIG_LAST3_REF
       }
 #else  // CONFIG_MULTI_REF
       const int ctx0 = vp9_get_pred_context_single_ref_p1(xd);
diff --git a/vp9/decoder/vp9_decoder.c b/vp9/decoder/vp9_decoder.c
index 73e6e33bf..130248170 100644
--- a/vp9/decoder/vp9_decoder.c
+++ b/vp9/decoder/vp9_decoder.c
@@ -158,7 +158,6 @@ vpx_codec_err_t vp9_set_reference_dec(VP9_COMMON *cm,
 #if CONFIG_MULTI_REF
   } else if (ref_frame_flag == VP9_LAST2_FLAG) {
     ref_buf = &cm->frame_refs[1];
-#if CONFIG_LAST3_REF
   } else if (ref_frame_flag == VP9_LAST3_FLAG) {
     ref_buf = &cm->frame_refs[2];
 #if CONFIG_LAST4_REF
@@ -174,12 +173,6 @@ vpx_codec_err_t vp9_set_reference_dec(VP9_COMMON *cm,
   } else if (ref_frame_flag == VP9_ALT_FLAG) {
     ref_buf = &cm->frame_refs[4];
 #endif  // CONFIG_LAST4_REF
-#else  // CONFIG_LAST3_REF
-  } else if (ref_frame_flag == VP9_GOLD_FLAG) {
-    ref_buf = &cm->frame_refs[2];
-  } else if (ref_frame_flag == VP9_ALT_FLAG) {
-    ref_buf = &cm->frame_refs[3];
-#endif  // CONFIG_LAST3_REF
 #else  // CONFIG_MULTI_REF
   } else if (ref_frame_flag == VP9_GOLD_FLAG) {
     ref_buf = &cm->frame_refs[1];
@@ -240,16 +233,12 @@ static void swap_frame_buffers(VP9Decoder *pbi) {
     // (2) The only exception is that when current frame is a KEY_FRAME, where
     //     all the frames in the frame buffer (cm->frame_bufs) get refreshed.
     if ((mask & 1) &&
-#if CONFIG_LAST3_REF
 #if CONFIG_LAST4_REF
         (cm->frame_type == KEY_FRAME ||
          (ref_index != 1 && ref_index != 2 && ref_index != 3))
 #else  // CONFIG_LAST4_REF
         (cm->frame_type == KEY_FRAME || (ref_index != 1 && ref_index != 2))
 #endif  // CONFIG_LAST4_REF
-#else  // CONFIG_LAST3_REF
-        (cm->frame_type == KEY_FRAME || ref_index != 1)
-#endif  // CONFIG_LAST3_REF
         ) {
 #else  // CONFIG_MULTI_REF
     if (mask & 1) {
@@ -263,7 +252,6 @@ static void swap_frame_buffers(VP9Decoder *pbi) {
         const int ref_index_last2 = ref_index + 1;
         const int old_buf_idx_last2 = cm->ref_frame_map[ref_index_last2];
 
-#if CONFIG_LAST3_REF
         if (mask & 4) {
           // If current is LAST_FRAME, and both LAST2_FRAME and LAST3_FRAME need
           // to get refreshed as well, then LAST3_FRAME should get handled first
@@ -301,7 +289,6 @@ static void swap_frame_buffers(VP9Decoder *pbi) {
                 &cm->frame_bufs[old_buf_idx_last3].raw_frame_buffer);
           }
         }
-#endif  // CONFIG_LAST3_REF
 
         ref_cnt_fb(cm->frame_bufs,
                    &cm->ref_frame_map[ref_index_last2],
diff --git a/vp9/encoder/vp9_bitstream.c b/vp9/encoder/vp9_bitstream.c
index d3d211fcc..f9ee48596 100644
--- a/vp9/encoder/vp9_bitstream.c
+++ b/vp9/encoder/vp9_bitstream.c
@@ -495,7 +495,7 @@ static void write_ref_frames(const VP9_COMMON *cm, const MACROBLOCKD *xd,
     }
 
     if (is_compound) {
-#if CONFIG_MULTI_REF && CONFIG_LAST3_REF
+#if CONFIG_MULTI_REF
 #if CONFIG_LAST4_REF
       const int bit = (mbmi->ref_frame[0] == GOLDEN_FRAME ||
                        mbmi->ref_frame[0] == LAST3_FRAME ||
@@ -506,14 +506,13 @@ static void write_ref_frames(const VP9_COMMON *cm, const MACROBLOCKD *xd,
 #endif  // CONFIG_LAST4_REF
 #else
       const int bit = mbmi->ref_frame[0] == GOLDEN_FRAME;
-#endif  // CONFIG_MULTI_REF && CONFIG_LAST3_REF
+#endif  // CONFIG_MULTI_REF
       vp9_write(w, bit, vp9_get_pred_prob_comp_ref_p(cm, xd));
 
 #if CONFIG_MULTI_REF
       if (!bit) {
         const int bit1 = mbmi->ref_frame[0] == LAST_FRAME;
         vp9_write(w, bit1, vp9_get_pred_prob_comp_ref_p1(cm, xd));
-#if CONFIG_LAST3_REF
       } else {
         const int bit2 = mbmi->ref_frame[0] == GOLDEN_FRAME;
         vp9_write(w, bit2, vp9_get_pred_prob_comp_ref_p2(cm, xd));
@@ -524,7 +523,6 @@ static void write_ref_frames(const VP9_COMMON *cm, const MACROBLOCKD *xd,
           vp9_write(w, bit3, vp9_get_pred_prob_comp_ref_p3(cm, xd));
         }
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
       }
 #endif  // CONFIG_MULTI_REF
     } else {
@@ -537,19 +535,14 @@ static void write_ref_frames(const VP9_COMMON *cm, const MACROBLOCKD *xd,
         const int bit1 = mbmi->ref_frame[0] != GOLDEN_FRAME;
         vp9_write(w, bit1, vp9_get_pred_prob_single_ref_p2(cm, xd));
       } else {
-#if CONFIG_LAST3_REF
 #if CONFIG_LAST4_REF
         const int bit2 = (mbmi->ref_frame[0] == LAST3_FRAME ||
                           mbmi->ref_frame[0] == LAST4_FRAME);
 #else  // CONFIG_LAST4_REF
         const int bit2 = mbmi->ref_frame[0] == LAST3_FRAME;
 #endif  // CONFIG_LAST4_REF
-#else  // CONFIG_LAST3_REF
-        const int bit2 = mbmi->ref_frame[0] != LAST_FRAME;
-#endif  // CONFIG_LAST3_REF
         vp9_write(w, bit2, vp9_get_pred_prob_single_ref_p3(cm, xd));
 
-#if CONFIG_LAST3_REF
         if (!bit2) {
           const int bit3 = mbmi->ref_frame[0] != LAST_FRAME;
           vp9_write(w, bit3, vp9_get_pred_prob_single_ref_p4(cm, xd));
@@ -559,7 +552,6 @@ static void write_ref_frames(const VP9_COMMON *cm, const MACROBLOCKD *xd,
           vp9_write(w, bit4, vp9_get_pred_prob_single_ref_p5(cm, xd));
 #endif  // CONFIG_LAST4_REF
         }
-#endif  // CONFIG_LAST3_REF
       }
 #else  // CONFIG_MULTI_REF
       const int bit0 = mbmi->ref_frame[0] != LAST_FRAME;
@@ -2206,12 +2198,10 @@ static int get_refresh_mask(VP9_COMP *cpi) {
     return (cpi->refresh_last_frame << cpi->lst_fb_idx) |
 #if CONFIG_MULTI_REF
            (cpi->refresh_last2_frame << cpi->lst2_fb_idx) |
-#if CONFIG_LAST3_REF
            (cpi->refresh_last3_frame << cpi->lst3_fb_idx) |
 #if CONFIG_LAST4_REF
            (cpi->refresh_last4_frame << cpi->lst4_fb_idx) |
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
            (cpi->refresh_golden_frame << cpi->alt_fb_idx);
   } else {
@@ -2223,12 +2213,10 @@ static int get_refresh_mask(VP9_COMP *cpi) {
     return (cpi->refresh_last_frame << cpi->lst_fb_idx) |
 #if CONFIG_MULTI_REF
            (cpi->refresh_last2_frame << cpi->lst2_fb_idx) |
-#if CONFIG_LAST3_REF
            (cpi->refresh_last3_frame << cpi->lst3_fb_idx) |
 #if CONFIG_LAST4_REF
            (cpi->refresh_last4_frame << cpi->lst4_fb_idx) |
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
            (cpi->refresh_golden_frame << cpi->gld_fb_idx) |
            (cpi->refresh_alt_ref_frame << arf_idx);
@@ -2436,12 +2424,10 @@ static void write_uncompressed_header(VP9_COMP *cpi,
 #if CONFIG_MULTI_REF
   cpi->refresh_last2_frame =
       (cm->frame_type == KEY_FRAME || cpi->refresh_last_frame) ? 1 : 0;
-#if CONFIG_LAST3_REF
   cpi->refresh_last3_frame = cpi->refresh_last2_frame ? 1 : 0;
 #if CONFIG_LAST4_REF
   cpi->refresh_last4_frame = cpi->refresh_last3_frame ? 1 : 0;
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
 
   if (cm->frame_type == KEY_FRAME) {
diff --git a/vp9/encoder/vp9_denoiser.c b/vp9/encoder/vp9_denoiser.c
index 98ca92db3..657868893 100644
--- a/vp9/encoder/vp9_denoiser.c
+++ b/vp9/encoder/vp9_denoiser.c
@@ -401,14 +401,12 @@ void vp9_denoiser_update_frame_info(VP9_DENOISER *denoiser,
     }
     if (refresh_last_frame) {
 #if CONFIG_MULTI_REF
-#if CONFIG_LAST3_REF
 #if CONFIG_LAST4_REF
       copy_frame(denoiser->running_avg_y[LAST4_FRAME],
                  denoiser->running_avg_y[LAST3_FRAME]);
 #endif  // CONFIG_LAST4_REF
       copy_frame(denoiser->running_avg_y[LAST3_FRAME],
                  denoiser->running_avg_y[LAST2_FRAME]);
-#endif  // CONFIG_LAST3_REF
       copy_frame(denoiser->running_avg_y[LAST2_FRAME],
                  denoiser->running_avg_y[LAST_FRAME]);
 #endif  // CONFIG_MULTI_REF
diff --git a/vp9/encoder/vp9_encodeframe.c b/vp9/encoder/vp9_encodeframe.c
index 648a2caf7..eeb5f3a17 100644
--- a/vp9/encoder/vp9_encodeframe.c
+++ b/vp9/encoder/vp9_encodeframe.c
@@ -1522,7 +1522,7 @@ static void update_stats(VP9_COMMON *cm, const MACROBLOCK *x) {
                             [has_second_ref(mbmi)]++;
 
         if (has_second_ref(mbmi)) {
-#if CONFIG_MULTI_REF && CONFIG_LAST3_REF
+#if CONFIG_MULTI_REF
 #if CONFIG_LAST4_REF
           const int bit = (ref0 == GOLDEN_FRAME || ref0 == LAST3_FRAME ||
                            ref0 == LAST4_FRAME);
@@ -1543,16 +1543,10 @@ static void update_stats(VP9_COMMON *cm, const MACROBLOCK *x) {
             }
 #endif  // CONFIG_LAST4_REF
           }
-#else  // CONFIG_MULTI_REF && CONFIG_LAST3_REF
+#else  // CONFIG_MULTI_REF
           counts->comp_ref[vp9_get_pred_context_comp_ref_p(cm, xd)][0]
                           [ref0 == GOLDEN_FRAME]++;
-#if  CONFIG_MULTI_REF
-          if (ref0 != GOLDEN_FRAME) {
-            counts->comp_ref[vp9_get_pred_context_comp_ref_p1(cm, xd)][1]
-                            [ref0 == LAST_FRAME]++;
-          }
 #endif  // CONFIG_MULTI_REF
-#endif  // CONFIG_MULTI_REF && CONFIG_LAST3_REF
         } else {
 #if CONFIG_MULTI_REF
           const int bit = (ref0 == ALTREF_FRAME || ref0 == GOLDEN_FRAME);
@@ -1561,7 +1555,6 @@ static void update_stats(VP9_COMMON *cm, const MACROBLOCK *x) {
             counts->single_ref[vp9_get_pred_context_single_ref_p2(xd)][1]
                               [ref0 != GOLDEN_FRAME]++;
           } else {
-#if CONFIG_LAST3_REF
             const int bit1 = !(ref0 == LAST2_FRAME || ref0 == LAST_FRAME);
             counts->single_ref[vp9_get_pred_context_single_ref_p3(xd)][2]
                               [bit1]++;
@@ -1574,10 +1567,6 @@ static void update_stats(VP9_COMMON *cm, const MACROBLOCK *x) {
                                 [ref0 != LAST3_FRAME]++;
 #endif  // CONFIG_LAST4_REF
             }
-#else   // CONFIG_LAST3_REF
-            counts->single_ref[vp9_get_pred_context_single_ref_p3(xd)][2]
-                              [ref0 != LAST_FRAME]++;
-#endif  // CONFIG_LAST3_REF
           }
 #else  // CONFIG_MULTI_REF
           counts->single_ref[vp9_get_pred_context_single_ref_p1(xd)][0]
@@ -3913,12 +3902,10 @@ static int check_dual_ref_flags(VP9_COMP *cpi) {
             !!(ref_flags & VP9_LAST_FLAG) +
 #if CONFIG_MULTI_REF
             !!(ref_flags & VP9_LAST2_FLAG) +
-#if CONFIG_LAST3_REF
             !!(ref_flags & VP9_LAST3_FLAG) +
 #if CONFIG_LAST4_REF
             !!(ref_flags & VP9_LAST4_FLAG) +
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
             !!(ref_flags & VP9_ALT_FLAG)) >= 2;
   }
@@ -4340,7 +4327,6 @@ void vp9_encode_frame(VP9_COMP *cpi) {
       cm->comp_var_ref[0] = LAST_FRAME;
 #if CONFIG_MULTI_REF
       cm->comp_var_ref[1] = LAST2_FRAME;
-#if CONFIG_LAST3_REF
       cm->comp_var_ref[2] = LAST3_FRAME;
 #if CONFIG_LAST4_REF
       cm->comp_var_ref[3] = LAST4_FRAME;
@@ -4348,9 +4334,6 @@ void vp9_encode_frame(VP9_COMP *cpi) {
 #else  // CONFIG_LAST4_REF
       cm->comp_var_ref[3] = GOLDEN_FRAME;
 #endif  // CONFIG_LAST4_REF
-#else  // CONFIG_LAST3_REF
-      cm->comp_var_ref[2] = GOLDEN_FRAME;
-#endif  // CONFIG_LAST3_REF
 #else  // CONFIG_MULTI_REF
       cm->comp_var_ref[1] = GOLDEN_FRAME;
 #endif  // CONFIG_MULTI_REF
diff --git a/vp9/encoder/vp9_encoder.c b/vp9/encoder/vp9_encoder.c
index 17be01d69..0de65bfcb 100644
--- a/vp9/encoder/vp9_encoder.c
+++ b/vp9/encoder/vp9_encoder.c
@@ -580,8 +580,6 @@ static void init_buffer_indices(VP9_COMP *cpi) {
   cpi->lst_fb_idx = 0;
 #if CONFIG_MULTI_REF
   cpi->lst2_fb_idx = 1;
-
-#if CONFIG_LAST3_REF
   cpi->lst3_fb_idx = 2;
 
 #if CONFIG_LAST4_REF
@@ -593,11 +591,6 @@ static void init_buffer_indices(VP9_COMP *cpi) {
   cpi->alt_fb_idx = 4;
 #endif  // CONFIG_LAST4_REF
 
-#else  // CONFIG_LAST3_REF
-  cpi->gld_fb_idx = 2;
-  cpi->alt_fb_idx = 3;
-#endif  // CONFIG_LAST3_REF
-
 #else  // CONFIG_MULTI_REF
   cpi->gld_fb_idx = 1;
   cpi->alt_fb_idx = 2;
@@ -1493,12 +1486,10 @@ void vp9_change_config(struct VP9_COMP *cpi, const VP9EncoderConfig *oxcf) {
   cpi->refresh_last_frame = 1;
 #if CONFIG_MULTI_REF
   cpi->refresh_last2_frame = 0;
-#if CONFIG_LAST3_REF
   cpi->refresh_last3_frame = 0;
 #if CONFIG_LAST4_REF
   cpi->refresh_last4_frame = 0;
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
   cm->refresh_frame_context = 1;
   cm->reset_frame_context = 0;
@@ -2274,12 +2265,10 @@ void vp9_update_reference(VP9_COMP *cpi, int ref_frame_flags) {
   cpi->ext_refresh_last_frame = (ref_frame_flags & VP9_LAST_FLAG) != 0;
 #if CONFIG_MULTI_REF
   cpi->ext_refresh_last2_frame = (ref_frame_flags & VP9_LAST2_FLAG) != 0;
-#if CONFIG_LAST3_REF
   cpi->ext_refresh_last3_frame = (ref_frame_flags & VP9_LAST3_FLAG) != 0;
 #if CONFIG_LAST4_REF
   cpi->ext_refresh_last4_frame = (ref_frame_flags & VP9_LAST4_FLAG) != 0;
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
   cpi->ext_refresh_frame_flags_pending = 1;
 }
@@ -2292,14 +2281,12 @@ static YV12_BUFFER_CONFIG *get_vp9_ref_frame_buffer(VP9_COMP *cpi,
 #if CONFIG_MULTI_REF
   else if (ref_frame_flag == VP9_LAST2_FLAG)
     ref_frame = LAST2_FRAME;
-#if CONFIG_LAST3_REF
   else if (ref_frame_flag == VP9_LAST3_FLAG)
     ref_frame = LAST3_FRAME;
 #if CONFIG_LAST4_REF
   else if (ref_frame_flag == VP9_LAST4_FLAG)
     ref_frame = LAST4_FRAME;
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
   else if (ref_frame_flag == VP9_GOLD_FLAG)
     ref_frame = GOLDEN_FRAME;
@@ -2624,7 +2611,6 @@ void vp9_update_reference_frames(VP9_COMP *cpi) {
   if (cpi->refresh_last_frame) {
 #if CONFIG_MULTI_REF
     if (cpi->refresh_last2_frame) {
-#if CONFIG_LAST3_REF
       if (cpi->refresh_last3_frame) {
 #if CONFIG_LAST4_REF
         if (cpi->refresh_last4_frame) {
@@ -2648,7 +2634,6 @@ void vp9_update_reference_frames(VP9_COMP *cpi) {
                      &cm->ref_frame_map[cpi->lst3_fb_idx],
                      cm->ref_frame_map[cpi->lst2_fb_idx]);
       }
-#endif  // CONFIG_LAST3_REF
 
       if (cm->frame_type == KEY_FRAME)
         ref_cnt_fb(cm->frame_bufs,
@@ -2666,7 +2651,6 @@ void vp9_update_reference_frames(VP9_COMP *cpi) {
     if (!cpi->rc.is_src_frame_alt_ref) {
 #if CONFIG_MULTI_REF
       if (cpi->refresh_last2_frame) {
-#if CONFIG_LAST3_REF
         if (cpi->refresh_last3_frame) {
 #if CONFIG_LAST4_REF
           if (cpi->refresh_last4_frame) {
@@ -2690,7 +2674,6 @@ void vp9_update_reference_frames(VP9_COMP *cpi) {
                        cpi->interp_filter_selected[LAST2_FRAME],
                        sizeof(cpi->interp_filter_selected[LAST2_FRAME]));
         }
-#endif  // CONFIG_LAST3_REF
 
         if (cm->frame_type == KEY_FRAME)
           vpx_memcpy(cpi->interp_filter_selected[LAST2_FRAME],
@@ -2759,12 +2742,10 @@ void vp9_scale_references(VP9_COMP *cpi) {
     VP9_LAST_FLAG,
 #if CONFIG_MULTI_REF
     VP9_LAST2_FLAG,
-#if CONFIG_LAST3_REF
     VP9_LAST3_FLAG,
 #if CONFIG_LAST4_REF
     VP9_LAST4_FLAG,
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
     VP9_GOLD_FLAG,
     VP9_ALT_FLAG
@@ -3166,7 +3147,6 @@ static int get_ref_frame_flags(const VP9_COMP *cpi) {
   const int gld_is_last2 = map[cpi->gld_fb_idx] == map[cpi->lst2_fb_idx];
   const int alt_is_last2 = map[cpi->alt_fb_idx] == map[cpi->lst2_fb_idx];
 
-#if CONFIG_LAST3_REF
   const int last3_is_last = map[cpi->lst3_fb_idx] == map[cpi->lst_fb_idx];
   const int last3_is_last2 = map[cpi->lst3_fb_idx] == map[cpi->lst2_fb_idx];
   const int gld_is_last3 = map[cpi->gld_fb_idx] == map[cpi->lst3_fb_idx];
@@ -3179,18 +3159,15 @@ static int get_ref_frame_flags(const VP9_COMP *cpi) {
   const int gld_is_last4 = map[cpi->gld_fb_idx] == map[cpi->lst4_fb_idx];
   const int alt_is_last4 = map[cpi->alt_fb_idx] == map[cpi->lst4_fb_idx];
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
 
   int flags = VP9_ALT_FLAG | VP9_GOLD_FLAG | VP9_LAST_FLAG;
 #if CONFIG_MULTI_REF
   flags |= VP9_LAST2_FLAG;
-#if CONFIG_LAST3_REF
   flags |= VP9_LAST3_FLAG;
 #if CONFIG_LAST4_REF
   flags |= VP9_LAST4_FLAG;
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
 
   if (gold_is_last)
@@ -3207,8 +3184,6 @@ static int get_ref_frame_flags(const VP9_COMP *cpi) {
 
 #if CONFIG_MULTI_REF
 
-#if CONFIG_LAST3_REF
-
 #if CONFIG_LAST4_REF
   if (last4_is_last || last4_is_last2 || last4_is_last3)
     flags &= ~VP9_LAST4_FLAG;
@@ -3228,7 +3203,6 @@ static int get_ref_frame_flags(const VP9_COMP *cpi) {
 
   if (alt_is_last3)
     flags &= ~VP9_ALT_FLAG;
-#endif  // CONFIG_LAST3_REF
 
   if (last2_is_last)
     flags &= ~VP9_LAST2_FLAG;
@@ -3256,12 +3230,10 @@ static void set_ext_overrides(VP9_COMP *cpi) {
     cpi->refresh_last_frame = cpi->ext_refresh_last_frame;
 #if CONFIG_MULTI_REF
     cpi->refresh_last2_frame = cpi->ext_refresh_last2_frame;
-#if CONFIG_LAST3_REF
     cpi->refresh_last3_frame = cpi->ext_refresh_last3_frame;
 #if CONFIG_LAST4_REF
     cpi->refresh_last4_frame = cpi->ext_refresh_last4_frame;
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
     cpi->refresh_golden_frame = cpi->ext_refresh_golden_frame;
     cpi->refresh_alt_ref_frame = cpi->ext_refresh_alt_ref_frame;
@@ -3364,7 +3336,6 @@ int setup_interp_filter_search_mask(VP9_COMP *cpi) {
         (ref_total[LAST2_FRAME] == 0 ||
          cpi->interp_filter_selected[LAST2_FRAME][ifilter] * 50
          < ref_total[LAST2_FRAME]) &&
-#if CONFIG_LAST3_REF
         (ref_total[LAST3_FRAME] == 0 ||
          cpi->interp_filter_selected[LAST3_FRAME][ifilter] * 50
          < ref_total[LAST3_FRAME]) &&
@@ -3373,7 +3344,6 @@ int setup_interp_filter_search_mask(VP9_COMP *cpi) {
          cpi->interp_filter_selected[LAST4_FRAME][ifilter] * 50
          < ref_total[LAST4_FRAME]) &&
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
         (ref_total[GOLDEN_FRAME] == 0 ||
          cpi->interp_filter_selected[GOLDEN_FRAME][ifilter] * 50
@@ -3608,12 +3578,12 @@ static void encode_frame_to_data_rate(VP9_COMP *cpi,
 
   cpi->ref_frame_flags = get_ref_frame_flags(cpi);
 
-#if CONFIG_MULTI_REF && CONFIG_LAST3_REF
+#if CONFIG_MULTI_REF
 #if CONFIG_LAST4_REF
   cm->last3_frame_type = cm->last2_frame_type;
 #endif  // CONFIG_LAST4_REF
   cm->last2_frame_type = cm->last_frame_type;
-#endif  // CONFIG_MULTI_REF && CONFIG_LAST3_REF
+#endif  // CONFIG_MULTI_REF
   cm->last_frame_type = cm->frame_type;
 
 #if CONFIG_LOOP_POSTFILTER
@@ -3757,12 +3727,10 @@ static int frame_is_reference(const VP9_COMP *cpi) {
          cpi->refresh_last_frame ||
 #if CONFIG_MULTI_REF
          cpi->refresh_last2_frame ||
-#if CONFIG_LAST3_REF
          cpi->refresh_last3_frame ||
 #if CONFIG_LAST4_REF
          cpi->refresh_last4_frame ||
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
          cpi->refresh_golden_frame ||
          cpi->refresh_alt_ref_frame ||
@@ -3885,12 +3853,10 @@ int vp9_get_compressed_data(VP9_COMP *cpi, unsigned int *frame_flags,
   cpi->refresh_last_frame = 1;
 #if CONFIG_MULTI_REF
   cpi->refresh_last2_frame = 0;
-#if CONFIG_LAST3_REF
   cpi->refresh_last3_frame = 0;
 #if CONFIG_LAST4_REF
   cpi->refresh_last4_frame = 0;
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
   cpi->refresh_golden_frame = 0;
   cpi->refresh_alt_ref_frame = 0;
@@ -3917,12 +3883,10 @@ int vp9_get_compressed_data(VP9_COMP *cpi, unsigned int *frame_flags,
       cpi->refresh_last_frame = 0;
 #if CONFIG_MULTI_REF
       cpi->refresh_last2_frame = 0;
-#if CONFIG_LAST3_REF
       cpi->refresh_last3_frame = 0;
 #if CONFIG_LAST4_REF
       cpi->refresh_last4_frame = 0;
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
       rc->is_src_frame_alt_ref = 0;
       rc->source_alt_ref_pending = 0;
diff --git a/vp9/encoder/vp9_encoder.h b/vp9/encoder/vp9_encoder.h
index 45920508b..e3de9c9d6 100644
--- a/vp9/encoder/vp9_encoder.h
+++ b/vp9/encoder/vp9_encoder.h
@@ -239,12 +239,10 @@ typedef struct VP9_COMP {
   int lst_fb_idx;
 #if CONFIG_MULTI_REF
   int lst2_fb_idx;
-#if CONFIG_LAST3_REF
   int lst3_fb_idx;
 #if CONFIG_LAST4_REF
   int lst4_fb_idx;
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
   int gld_fb_idx;
   int alt_fb_idx;
@@ -252,12 +250,10 @@ typedef struct VP9_COMP {
   int refresh_last_frame;
 #if CONFIG_MULTI_REF
   int refresh_last2_frame;
-#if CONFIG_LAST3_REF
   int refresh_last3_frame;
 #if CONFIG_LAST4_REF
   int refresh_last4_frame;
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
   int refresh_golden_frame;
   int refresh_alt_ref_frame;
@@ -267,12 +263,10 @@ typedef struct VP9_COMP {
   int ext_refresh_last_frame;
 #if CONFIG_MULTI_REF
   int ext_refresh_last2_frame;
-#if CONFIG_LAST3_REF
   int ext_refresh_last3_frame;
 #if CONFIG_LAST4_REF
   int ext_refresh_last4_frame;
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
   int ext_refresh_golden_frame;
   int ext_refresh_alt_ref_frame;
@@ -513,14 +507,12 @@ static INLINE int get_ref_frame_idx(const VP9_COMP *cpi,
 #if CONFIG_MULTI_REF
   } else if (ref_frame == LAST2_FRAME) {
     return cpi->lst2_fb_idx;
-#if CONFIG_LAST3_REF
   } else if (ref_frame == LAST3_FRAME) {
     return cpi->lst3_fb_idx;
 #if CONFIG_LAST4_REF
   } else if (ref_frame == LAST4_FRAME) {
     return cpi->lst4_fb_idx;
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
   } else if (ref_frame == GOLDEN_FRAME) {
     return cpi->gld_fb_idx;
diff --git a/vp9/encoder/vp9_rd.c b/vp9/encoder/vp9_rd.c
index 634806ce9..7cdb2c66a 100644
--- a/vp9/encoder/vp9_rd.c
+++ b/vp9/encoder/vp9_rd.c
@@ -629,12 +629,10 @@ void vp9_set_rd_speed_thresholds(VP9_COMP *cpi) {
     rd->thresh_mult[THR_NEARESTMV] = 300;
 #if CONFIG_MULTI_REF
     rd->thresh_mult[THR_NEARESTL2] = 300;
-#if CONFIG_LAST3_REF
     rd->thresh_mult[THR_NEARESTL3] = 300;
 #if CONFIG_LAST4_REF
     rd->thresh_mult[THR_NEARESTL4] = 300;
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
     rd->thresh_mult[THR_NEARESTG] = 300;
     rd->thresh_mult[THR_NEARESTA] = 300;
@@ -642,12 +640,10 @@ void vp9_set_rd_speed_thresholds(VP9_COMP *cpi) {
     rd->thresh_mult[THR_NEARESTMV] = 0;
 #if CONFIG_MULTI_REF
     rd->thresh_mult[THR_NEARESTL2] = 0;
-#if CONFIG_LAST3_REF
     rd->thresh_mult[THR_NEARESTL3] = 0;
 #if CONFIG_LAST4_REF
     rd->thresh_mult[THR_NEARESTL4] = 0;
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
     rd->thresh_mult[THR_NEARESTG] = 0;
     rd->thresh_mult[THR_NEARESTA] = 0;
@@ -658,12 +654,10 @@ void vp9_set_rd_speed_thresholds(VP9_COMP *cpi) {
   rd->thresh_mult[THR_NEWMV] += 1000;
 #if CONFIG_MULTI_REF
   rd->thresh_mult[THR_NEWL2] += 1000;
-#if CONFIG_LAST3_REF
   rd->thresh_mult[THR_NEWL3] += 1000;
 #if CONFIG_LAST4_REF
   rd->thresh_mult[THR_NEWL4] += 1000;
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
   rd->thresh_mult[THR_NEWG] += 1000;
   rd->thresh_mult[THR_NEWA] += 1000;
@@ -672,12 +666,10 @@ void vp9_set_rd_speed_thresholds(VP9_COMP *cpi) {
   rd->thresh_mult[THR_NEW2MV] += 1000;
 #if CONFIG_MULTI_REF
   rd->thresh_mult[THR_NEW2L2] += 1000;
-#if CONFIG_LAST3_REF
   rd->thresh_mult[THR_NEW2L3] += 1000;
 #if CONFIG_LAST4_REF
   rd->thresh_mult[THR_NEW2L4] += 1000;
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
   rd->thresh_mult[THR_NEW2G] += 1000;
   rd->thresh_mult[THR_NEW2A] += 1000;
@@ -686,12 +678,10 @@ void vp9_set_rd_speed_thresholds(VP9_COMP *cpi) {
   rd->thresh_mult[THR_NEARMV] += 1000;
 #if CONFIG_MULTI_REF
   rd->thresh_mult[THR_NEARL2] += 1000;
-#if CONFIG_LAST3_REF
   rd->thresh_mult[THR_NEARL3] += 1000;
 #if CONFIG_LAST4_REF
   rd->thresh_mult[THR_NEARL4] += 1000;
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
   rd->thresh_mult[THR_NEARG] += 1000;
   rd->thresh_mult[THR_NEARA] += 1000;
@@ -701,12 +691,10 @@ void vp9_set_rd_speed_thresholds(VP9_COMP *cpi) {
   rd->thresh_mult[THR_ZEROMV] += 2000;
 #if CONFIG_MULTI_REF
   rd->thresh_mult[THR_ZEROL2] += 2000;
-#if CONFIG_LAST3_REF
   rd->thresh_mult[THR_ZEROL3] += 2000;
 #if CONFIG_LAST4_REF
   rd->thresh_mult[THR_ZEROL4] += 2000;
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
   rd->thresh_mult[THR_ZEROG] += 2000;
   rd->thresh_mult[THR_ZEROA] += 2000;
@@ -742,7 +730,6 @@ void vp9_set_rd_speed_thresholds(VP9_COMP *cpi) {
   rd->thresh_mult[THR_COMP_NEW_NEWL2A] += 2000;
   rd->thresh_mult[THR_COMP_ZERO_ZEROL2A] += 2500;
 
-#if CONFIG_LAST3_REF
   rd->thresh_mult[THR_COMP_NEAREST_NEARESTL3A] += 1000;
   rd->thresh_mult[THR_COMP_NEAREST_NEARL3A] += 1200;
   rd->thresh_mult[THR_COMP_NEAR_NEARESTL3A] += 1200;
@@ -765,7 +752,6 @@ void vp9_set_rd_speed_thresholds(VP9_COMP *cpi) {
   rd->thresh_mult[THR_COMP_ZERO_ZEROL4A] += 2500;
 
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
 
 #else  // CONFIG_NEW_INTER
@@ -784,7 +770,6 @@ void vp9_set_rd_speed_thresholds(VP9_COMP *cpi) {
   rd->thresh_mult[THR_COMP_NEWL2A] += 2000;
   rd->thresh_mult[THR_COMP_ZEROL2A] += 2500;
 
-#if CONFIG_LAST3_REF
   rd->thresh_mult[THR_COMP_NEARESTL3A] += 1000;
   rd->thresh_mult[THR_COMP_NEARL3A] += 1500;
   rd->thresh_mult[THR_COMP_NEWL3A] += 2000;
@@ -797,7 +782,6 @@ void vp9_set_rd_speed_thresholds(VP9_COMP *cpi) {
   rd->thresh_mult[THR_COMP_ZEROL4A] += 2500;
 
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
 
 #endif  // CONFIG_NEW_INTER
@@ -815,12 +799,10 @@ void vp9_set_rd_speed_thresholds(VP9_COMP *cpi) {
   rd->thresh_mult[THR_COMP_INTERINTRA_ZEROL   ] += 1500;
 #if CONFIG_MULTI_REF
   rd->thresh_mult[THR_COMP_INTERINTRA_ZEROL2  ] += 1500;
-#if CONFIG_LAST3_REF
   rd->thresh_mult[THR_COMP_INTERINTRA_ZEROL3  ] += 1500;
 #if CONFIG_LAST4_REF
   rd->thresh_mult[THR_COMP_INTERINTRA_ZEROL4  ] += 1500;
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
   rd->thresh_mult[THR_COMP_INTERINTRA_ZEROG   ] += 1500;
   rd->thresh_mult[THR_COMP_INTERINTRA_ZEROA   ] += 1500;
@@ -828,12 +810,10 @@ void vp9_set_rd_speed_thresholds(VP9_COMP *cpi) {
   rd->thresh_mult[THR_COMP_INTERINTRA_NEARESTL] += 1500;
 #if CONFIG_MULTI_REF
   rd->thresh_mult[THR_COMP_INTERINTRA_NEARESTL2] += 1500;
-#if CONFIG_LAST3_REF
   rd->thresh_mult[THR_COMP_INTERINTRA_NEARESTL3] += 1500;
 #if CONFIG_LAST4_REF
   rd->thresh_mult[THR_COMP_INTERINTRA_NEARESTL4] += 1500;
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
   rd->thresh_mult[THR_COMP_INTERINTRA_NEARESTG] += 1500;
   rd->thresh_mult[THR_COMP_INTERINTRA_NEARESTA] += 1500;
@@ -841,12 +821,10 @@ void vp9_set_rd_speed_thresholds(VP9_COMP *cpi) {
   rd->thresh_mult[THR_COMP_INTERINTRA_NEARL   ] += 1500;
 #if CONFIG_MULTI_REF
   rd->thresh_mult[THR_COMP_INTERINTRA_NEARL2  ] += 1500;
-#if CONFIG_LAST3_REF
   rd->thresh_mult[THR_COMP_INTERINTRA_NEARL3  ] += 1500;
 #if CONFIG_LAST4_REF
   rd->thresh_mult[THR_COMP_INTERINTRA_NEARL4  ] += 1500;
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
   rd->thresh_mult[THR_COMP_INTERINTRA_NEARG   ] += 1500;
   rd->thresh_mult[THR_COMP_INTERINTRA_NEARA   ] += 1500;
@@ -854,12 +832,10 @@ void vp9_set_rd_speed_thresholds(VP9_COMP *cpi) {
   rd->thresh_mult[THR_COMP_INTERINTRA_NEWL    ] += 2000;
 #if CONFIG_MULTI_REF
   rd->thresh_mult[THR_COMP_INTERINTRA_NEWL2   ] += 2000;
-#if CONFIG_LAST3_REF
   rd->thresh_mult[THR_COMP_INTERINTRA_NEWL3   ] += 2000;
 #if CONFIG_LAST4_REF
   rd->thresh_mult[THR_COMP_INTERINTRA_NEWL4   ] += 2000;
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
   rd->thresh_mult[THR_COMP_INTERINTRA_NEWG    ] += 2000;
   rd->thresh_mult[THR_COMP_INTERINTRA_NEWA    ] += 2000;
@@ -877,12 +853,10 @@ void vp9_set_rd_speed_thresholds_sub8x8(VP9_COMP *cpi) {
   rd->thresh_mult_sub8x8[THR_LAST] += 2500;
 #if CONFIG_MULTI_REF
   rd->thresh_mult_sub8x8[THR_LAST2] += 2500;
-#if CONFIG_LAST3_REF
   rd->thresh_mult_sub8x8[THR_LAST3] += 2500;
 #if CONFIG_LAST4_REF
   rd->thresh_mult_sub8x8[THR_LAST4] += 2500;
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
   rd->thresh_mult_sub8x8[THR_GOLD] += 2500;
   rd->thresh_mult_sub8x8[THR_ALTR] += 2500;
@@ -890,12 +864,10 @@ void vp9_set_rd_speed_thresholds_sub8x8(VP9_COMP *cpi) {
   rd->thresh_mult_sub8x8[THR_COMP_LA] += 4500;
 #if CONFIG_MULTI_REF
   rd->thresh_mult_sub8x8[THR_COMP_L2A] += 4500;
-#if CONFIG_LAST3_REF
   rd->thresh_mult_sub8x8[THR_COMP_L3A] += 4500;
 #if CONFIG_LAST4_REF
   rd->thresh_mult_sub8x8[THR_COMP_L4A] += 4500;
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
   rd->thresh_mult_sub8x8[THR_COMP_GA] += 4500;
 
diff --git a/vp9/encoder/vp9_rd.h b/vp9/encoder/vp9_rd.h
index 71818faba..daabc4151 100644
--- a/vp9/encoder/vp9_rd.h
+++ b/vp9/encoder/vp9_rd.h
@@ -39,8 +39,6 @@ extern "C" {
 
 #if CONFIG_MULTI_REF
 
-#if CONFIG_LAST3_REF
-
 #if CONFIG_LAST4_REF
 
 #if CONFIG_NEW_INTER
@@ -83,28 +81,6 @@ extern "C" {
 
 #endif  // CONFIG_LAST4_REF
 
-#else  // CONFIG_LAST3_REF
-
-#if CONFIG_NEW_INTER
-
-#if CONFIG_INTERINTRA
-#define MAX_MODES 73
-#else  // CONFIG_INTERINTRA
-#define MAX_MODES 57
-#endif  // CONFIG_INTERINTRA
-
-#else   // CONFIG_NEW_INTER
-
-#if CONFIG_INTERINTRA
-#define MAX_MODES 54
-#else  // CONFIG_INTERINTRA
-#define MAX_MODES 38
-#endif  // CONFIG_INTERINTRA
-
-#endif  // CONFIG_NEW_INTER
-
-#endif  // CONFIG_LAST3_REF
-
 #else  // CONFIG_MULTI_REF
 
 #if CONFIG_NEW_INTER
@@ -128,15 +104,11 @@ extern "C" {
 #endif  // CONFIG_MULTI_REF
 
 #if CONFIG_MULTI_REF
-#if CONFIG_LAST3_REF
 #if CONFIG_LAST4_REF
 #define MAX_REFS  12
 #else  // CONFIG_LAST4_REF
 #define MAX_REFS  10
 #endif  // CONFIG_LAST4_REF
-#else  // CONFIG_LAST3_REF
-#define MAX_REFS  8
-#endif  // CONFIG_LAST3_REF
 #else  // CONFIG_MULTI_REF
 #define MAX_REFS  6
 #endif  // CONFIG_MULTI_REF
@@ -147,12 +119,10 @@ typedef enum {
   THR_NEARESTMV,
 #if CONFIG_MULTI_REF
   THR_NEARESTL2,
-#if CONFIG_LAST3_REF
   THR_NEARESTL3,
 #if CONFIG_LAST4_REF
   THR_NEARESTL4,
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
   THR_NEARESTA,
   THR_NEARESTG,
@@ -162,12 +132,10 @@ typedef enum {
   THR_NEWMV,
 #if CONFIG_MULTI_REF
   THR_NEWL2,
-#if CONFIG_LAST3_REF
   THR_NEWL3,
 #if CONFIG_LAST4_REF
   THR_NEWL4,
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
   THR_NEWA,
   THR_NEWG,
@@ -176,12 +144,10 @@ typedef enum {
   THR_NEW2MV,
 #if CONFIG_MULTI_REF
   THR_NEW2L2,
-#if CONFIG_LAST3_REF
   THR_NEW2L3,
 #if CONFIG_LAST4_REF
   THR_NEW2L4,
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
   THR_NEW2A,
   THR_NEW2G,
@@ -190,12 +156,10 @@ typedef enum {
   THR_NEARMV,
 #if CONFIG_MULTI_REF
   THR_NEARL2,
-#if CONFIG_LAST3_REF
   THR_NEARL3,
 #if CONFIG_LAST4_REF
   THR_NEARL4,
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
   THR_NEARA,
   THR_NEARG,
@@ -203,12 +167,10 @@ typedef enum {
   THR_ZEROMV,
 #if CONFIG_MULTI_REF
   THR_ZEROL2,
-#if CONFIG_LAST3_REF
   THR_ZEROL3,
 #if CONFIG_LAST4_REF
   THR_ZEROL4,
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
   THR_ZEROG,
   THR_ZEROA,
@@ -217,24 +179,20 @@ typedef enum {
   THR_COMP_NEAREST_NEARESTLA,
 #if CONFIG_MULTI_REF
   THR_COMP_NEAREST_NEARESTL2A,
-#if CONFIG_LAST3_REF
   THR_COMP_NEAREST_NEARESTL3A,
 #if CONFIG_LAST4_REF
   THR_COMP_NEAREST_NEARESTL4A,
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
   THR_COMP_NEAREST_NEARESTGA,
 #else  // CONFIG_NEW_INTER
   THR_COMP_NEARESTLA,
 #if CONFIG_MULTI_REF
   THR_COMP_NEARESTL2A,
-#if CONFIG_LAST3_REF
   THR_COMP_NEARESTL3A,
 #if CONFIG_LAST4_REF
   THR_COMP_NEARESTL4A,
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
   THR_COMP_NEARESTGA,
 #endif  // CONFIG_NEW_INTER
@@ -276,7 +234,6 @@ typedef enum {
   THR_COMP_NEW_NEWL2A,
   THR_COMP_ZERO_ZEROL2A,
 
-#if CONFIG_LAST3_REF
   THR_COMP_NEAR_NEARESTL3A,
   THR_COMP_NEAREST_NEARL3A,
 
@@ -303,7 +260,6 @@ typedef enum {
   THR_COMP_ZERO_ZEROL4A,
 
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
 
 #else  // CONFIG_NEW_INTER
@@ -320,7 +276,6 @@ typedef enum {
   THR_COMP_NEWL2A,
   THR_COMP_ZEROL2A,
 
-#if CONFIG_LAST3_REF
   THR_COMP_NEARL3A,
   THR_COMP_NEWL3A,
   THR_COMP_ZEROL3A,
@@ -329,9 +284,8 @@ typedef enum {
   THR_COMP_NEARL4A,
   THR_COMP_NEWL4A,
   THR_COMP_ZEROL4A,
-
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
+
 #endif  // CONFIG_MULTI_REF
 
 #endif  // CONFIG_NEW_INTER
@@ -357,7 +311,6 @@ typedef enum {
   THR_COMP_INTERINTRA_NEARL2,
   THR_COMP_INTERINTRA_NEWL2,
 
-#if CONFIG_LAST3_REF
   THR_COMP_INTERINTRA_ZEROL3,
   THR_COMP_INTERINTRA_NEARESTL3,
   THR_COMP_INTERINTRA_NEARL3,
@@ -370,7 +323,6 @@ typedef enum {
   THR_COMP_INTERINTRA_NEWL4,
 
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
 
   THR_COMP_INTERINTRA_ZEROG,
@@ -389,24 +341,20 @@ typedef enum {
   THR_LAST,
 #if CONFIG_MULTI_REF
   THR_LAST2,
-#if CONFIG_LAST3_REF
   THR_LAST3,
 #if CONFIG_LAST4_REF
   THR_LAST4,
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
   THR_GOLD,
   THR_ALTR,
   THR_COMP_LA,
 #if CONFIG_MULTI_REF
   THR_COMP_L2A,
-#if CONFIG_LAST3_REF
   THR_COMP_L3A,
 #if CONFIG_LAST4_REF
   THR_COMP_L4A,
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
   THR_COMP_GA,
   THR_INTRA,
diff --git a/vp9/encoder/vp9_rdopt.c b/vp9/encoder/vp9_rdopt.c
index 39f733c6e..addfa6599 100644
--- a/vp9/encoder/vp9_rdopt.c
+++ b/vp9/encoder/vp9_rdopt.c
@@ -50,8 +50,6 @@
 
 #if CONFIG_MULTI_REF
 
-#if CONFIG_LAST3_REF
-
 #if CONFIG_LAST4_REF
 
 #define LAST_FRAME_MODE_MASK    ((1 << GOLDEN_FRAME) | (1 << ALTREF_FRAME) | \
@@ -93,19 +91,6 @@
 
 #endif  // CONFIG_LAST4_REF
 
-#else  // CONFIG_LAST3_REF
-
-#define LAST_FRAME_MODE_MASK    ((1 << GOLDEN_FRAME) | (1 << ALTREF_FRAME) | \
-                                 (1 << LAST2_FRAME) | (1 << INTRA_FRAME))
-#define LAST2_FRAME_MODE_MASK   ((1 << GOLDEN_FRAME) | (1 << ALTREF_FRAME) | \
-                                 (1 << LAST_FRAME) | (1 << INTRA_FRAME))
-#define GOLDEN_FRAME_MODE_MASK  ((1 << LAST_FRAME) | (1 << ALTREF_FRAME) | \
-                                 (1 << LAST2_FRAME) | (1 << INTRA_FRAME))
-#define ALT_REF_MODE_MASK       ((1 << LAST_FRAME) | (1 << GOLDEN_FRAME) | \
-                                 (1 << LAST2_FRAME) | (1 << INTRA_FRAME))
-
-#endif  // CONFIG_LAST3_REF
-
 #else  // CONFIG_MULTI_REF
 
 #define LAST_FRAME_MODE_MASK    ((1 << GOLDEN_FRAME) | (1 << ALTREF_FRAME) | \
@@ -155,12 +140,10 @@ static const MODE_DEFINITION vp9_mode_order[MAX_MODES] = {
   {NEARESTMV, {LAST_FRAME,   NONE}},
 #if CONFIG_MULTI_REF
   {NEARESTMV, {LAST2_FRAME,  NONE}},
-#if CONFIG_LAST3_REF
   {NEARESTMV, {LAST3_FRAME,  NONE}},
 #if CONFIG_LAST4_REF
   {NEARESTMV, {LAST4_FRAME,  NONE}},
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
   {NEARESTMV, {ALTREF_FRAME, NONE}},
   {NEARESTMV, {GOLDEN_FRAME, NONE}},
@@ -170,12 +153,10 @@ static const MODE_DEFINITION vp9_mode_order[MAX_MODES] = {
   {NEWMV,     {LAST_FRAME,   NONE}},
 #if CONFIG_MULTI_REF
   {NEWMV,     {LAST2_FRAME,  NONE}},
-#if CONFIG_LAST3_REF
   {NEWMV,     {LAST3_FRAME,  NONE}},
 #if CONFIG_LAST4_REF
   {NEWMV,     {LAST4_FRAME,  NONE}},
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
   {NEWMV,     {ALTREF_FRAME, NONE}},
   {NEWMV,     {GOLDEN_FRAME, NONE}},
@@ -184,12 +165,10 @@ static const MODE_DEFINITION vp9_mode_order[MAX_MODES] = {
   {NEW2MV, {LAST_FRAME,   NONE}},
 #if CONFIG_MULTI_REF
   {NEW2MV, {LAST2_FRAME,  NONE}},
-#if CONFIG_LAST3_REF
   {NEW2MV, {LAST3_FRAME,  NONE}},
 #if CONFIG_LAST4_REF
   {NEW2MV, {LAST4_FRAME,  NONE}},
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
   {NEW2MV, {ALTREF_FRAME, NONE}},
   {NEW2MV, {GOLDEN_FRAME, NONE}},
@@ -198,12 +177,10 @@ static const MODE_DEFINITION vp9_mode_order[MAX_MODES] = {
   {NEARMV,    {LAST_FRAME,   NONE}},
 #if CONFIG_MULTI_REF
   {NEARMV,    {LAST2_FRAME,  NONE}},
-#if CONFIG_LAST3_REF
   {NEARMV,    {LAST3_FRAME,  NONE}},
 #if CONFIG_LAST4_REF
   {NEARMV,    {LAST4_FRAME,  NONE}},
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
   {NEARMV,    {ALTREF_FRAME, NONE}},
   {NEARMV,    {GOLDEN_FRAME, NONE}},
@@ -211,12 +188,10 @@ static const MODE_DEFINITION vp9_mode_order[MAX_MODES] = {
   {ZEROMV,    {LAST_FRAME,   NONE}},
 #if CONFIG_MULTI_REF
   {ZEROMV,    {LAST2_FRAME,  NONE}},
-#if CONFIG_LAST3_REF
   {ZEROMV,    {LAST3_FRAME,  NONE}},
 #if CONFIG_LAST4_REF
   {ZEROMV,    {LAST4_FRAME,  NONE}},
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
   {ZEROMV,    {GOLDEN_FRAME, NONE}},
   {ZEROMV,    {ALTREF_FRAME, NONE}},
@@ -225,12 +200,10 @@ static const MODE_DEFINITION vp9_mode_order[MAX_MODES] = {
   {NEAREST_NEARESTMV, {LAST_FRAME,   ALTREF_FRAME}},
 #if CONFIG_MULTI_REF
   {NEAREST_NEARESTMV, {LAST2_FRAME,  ALTREF_FRAME}},
-#if CONFIG_LAST3_REF
   {NEAREST_NEARESTMV, {LAST3_FRAME,  ALTREF_FRAME}},
 #if CONFIG_LAST4_REF
   {NEAREST_NEARESTMV, {LAST4_FRAME,  ALTREF_FRAME}},
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
   {NEAREST_NEARESTMV, {GOLDEN_FRAME, ALTREF_FRAME}},
 
@@ -238,12 +211,10 @@ static const MODE_DEFINITION vp9_mode_order[MAX_MODES] = {
   {NEARESTMV, {LAST_FRAME,   ALTREF_FRAME}},
 #if CONFIG_MULTI_REF
   {NEARESTMV, {LAST2_FRAME,  ALTREF_FRAME}},
-#if CONFIG_LAST3_REF
   {NEARESTMV, {LAST3_FRAME,  ALTREF_FRAME}},
 #if CONFIG_LAST4_REF
   {NEARESTMV, {LAST4_FRAME,  ALTREF_FRAME}},
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
   {NEARESTMV, {GOLDEN_FRAME, ALTREF_FRAME}},
 
@@ -285,7 +256,6 @@ static const MODE_DEFINITION vp9_mode_order[MAX_MODES] = {
   {NEW_NEWMV,      {LAST2_FRAME,  ALTREF_FRAME}},
   {ZERO_ZEROMV,    {LAST2_FRAME,  ALTREF_FRAME}},
 
-#if CONFIG_LAST3_REF
   {NEAR_NEARESTMV, {LAST3_FRAME,  ALTREF_FRAME}},
   {NEAREST_NEARMV, {LAST3_FRAME,  ALTREF_FRAME}},
 
@@ -312,8 +282,6 @@ static const MODE_DEFINITION vp9_mode_order[MAX_MODES] = {
   {ZERO_ZEROMV,    {LAST4_FRAME,  ALTREF_FRAME}},
 #endif  // CONFIG_LAST4_REF
 
-#endif  // CONFIG_LAST3_REF
-
 #endif  // CONFIG_MULTI_REF
 
 #else  /// CONFIG_NEW_INTER
@@ -330,7 +298,6 @@ static const MODE_DEFINITION vp9_mode_order[MAX_MODES] = {
   {NEWMV,     {LAST2_FRAME,  ALTREF_FRAME}},
   {ZEROMV,    {LAST2_FRAME,  ALTREF_FRAME}},
 
-#if CONFIG_LAST3_REF
   {NEARMV,    {LAST3_FRAME,  ALTREF_FRAME}},
   {NEWMV,     {LAST3_FRAME,  ALTREF_FRAME}},
   {ZEROMV,    {LAST3_FRAME,  ALTREF_FRAME}},
@@ -340,7 +307,6 @@ static const MODE_DEFINITION vp9_mode_order[MAX_MODES] = {
   {NEWMV,     {LAST4_FRAME,  ALTREF_FRAME}},
   {ZEROMV,    {LAST4_FRAME,  ALTREF_FRAME}},
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
 
 #endif  // CONFIG_NEW_INTER
@@ -366,7 +332,6 @@ static const MODE_DEFINITION vp9_mode_order[MAX_MODES] = {
   {NEARMV,    {LAST2_FRAME,  INTRA_FRAME}},
   {NEWMV,     {LAST2_FRAME,  INTRA_FRAME}},
 
-#if CONFIG_LAST3_REF
   {ZEROMV,    {LAST3_FRAME,  INTRA_FRAME}},
   {NEARESTMV, {LAST3_FRAME,  INTRA_FRAME}},
   {NEARMV,    {LAST3_FRAME,  INTRA_FRAME}},
@@ -378,7 +343,6 @@ static const MODE_DEFINITION vp9_mode_order[MAX_MODES] = {
   {NEARMV,    {LAST4_FRAME,  INTRA_FRAME}},
   {NEWMV,     {LAST4_FRAME,  INTRA_FRAME}},
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
 
   {ZEROMV,    {GOLDEN_FRAME, INTRA_FRAME}},
@@ -397,24 +361,20 @@ static const REF_DEFINITION vp9_ref_order[MAX_REFS] = {
   {{LAST_FRAME,   NONE}},
 #if CONFIG_MULTI_REF
   {{LAST2_FRAME,  NONE}},
-#if CONFIG_LAST3_REF
   {{LAST3_FRAME,  NONE}},
 #if CONFIG_LAST4_REF
   {{LAST4_FRAME,  NONE}},
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
   {{GOLDEN_FRAME, NONE}},
   {{ALTREF_FRAME, NONE}},
   {{LAST_FRAME,   ALTREF_FRAME}},
 #if CONFIG_MULTI_REF
   {{LAST2_FRAME,  ALTREF_FRAME}},
-#if CONFIG_LAST3_REF
   {{LAST3_FRAME,  ALTREF_FRAME}},
 #if CONFIG_LAST4_REF
   {{LAST4_FRAME,  ALTREF_FRAME}},
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
   {{GOLDEN_FRAME, ALTREF_FRAME}},
   {{INTRA_FRAME,  NONE}},
@@ -4544,12 +4504,10 @@ static void estimate_ref_frame_costs(const VP9_COMMON *cm,
       vp9_prob ref_single_p2 = vp9_get_pred_prob_single_ref_p2(cm, xd);
 #if CONFIG_MULTI_REF
       vp9_prob ref_single_p3 = vp9_get_pred_prob_single_ref_p3(cm, xd);
-#if CONFIG_LAST3_REF
       vp9_prob ref_single_p4 = vp9_get_pred_prob_single_ref_p4(cm, xd);
 #if CONFIG_LAST4_REF
       vp9_prob ref_single_p5 = vp9_get_pred_prob_single_ref_p5(cm, xd);
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
       unsigned int base_cost = vp9_cost_bit(intra_inter_p, 1);
 
@@ -4559,18 +4517,15 @@ static void estimate_ref_frame_costs(const VP9_COMMON *cm,
       ref_costs_single[LAST_FRAME] =
 #if CONFIG_MULTI_REF
           ref_costs_single[LAST2_FRAME] =
-#if CONFIG_LAST3_REF
           ref_costs_single[LAST3_FRAME] =
 #if CONFIG_LAST4_REF
           ref_costs_single[LAST4_FRAME] =
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
           ref_costs_single[GOLDEN_FRAME] =
           ref_costs_single[ALTREF_FRAME] = base_cost;
 
 #if CONFIG_MULTI_REF
-#if CONFIG_LAST3_REF
 #if CONFIG_LAST4_REF
       ref_costs_single[LAST_FRAME]   += vp9_cost_bit(ref_single_p1, 0);
       ref_costs_single[LAST2_FRAME]  += vp9_cost_bit(ref_single_p1, 0);
@@ -4606,16 +4561,6 @@ static void estimate_ref_frame_costs(const VP9_COMMON *cm,
       ref_costs_single[LAST_FRAME]   += vp9_cost_bit(ref_single_p4, 0);
       ref_costs_single[LAST2_FRAME]  += vp9_cost_bit(ref_single_p4, 1);
 #endif  // CONFIG_LAST4_REF
-#else  // CONFIG_LAST3_REF
-      ref_costs_single[LAST_FRAME]   += vp9_cost_bit(ref_single_p1, 0);
-      ref_costs_single[LAST2_FRAME]  += vp9_cost_bit(ref_single_p1, 0);
-      ref_costs_single[GOLDEN_FRAME] += vp9_cost_bit(ref_single_p1, 1);
-      ref_costs_single[ALTREF_FRAME] += vp9_cost_bit(ref_single_p1, 1);
-      ref_costs_single[LAST_FRAME]   += vp9_cost_bit(ref_single_p3, 0);
-      ref_costs_single[LAST2_FRAME]  += vp9_cost_bit(ref_single_p3, 1);
-      ref_costs_single[GOLDEN_FRAME] += vp9_cost_bit(ref_single_p2, 0);
-      ref_costs_single[ALTREF_FRAME] += vp9_cost_bit(ref_single_p2, 1);
-#endif  // CONFIG_LAST3_REF
 #else  // CONFIG_MULTI_REF
       ref_costs_single[LAST_FRAME]   += vp9_cost_bit(ref_single_p1, 0);
       ref_costs_single[GOLDEN_FRAME] += vp9_cost_bit(ref_single_p1, 1);
@@ -4627,12 +4572,10 @@ static void estimate_ref_frame_costs(const VP9_COMMON *cm,
       ref_costs_single[LAST_FRAME]   = 512;
 #if CONFIG_MULTI_REF
       ref_costs_single[LAST2_FRAME]  = 512;
-#if CONFIG_LAST3_REF
       ref_costs_single[LAST3_FRAME]  = 512;
 #if CONFIG_LAST4_REF
       ref_costs_single[LAST4_FRAME]  = 512;
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
       ref_costs_single[GOLDEN_FRAME] = 512;
       ref_costs_single[ALTREF_FRAME] = 512;
@@ -4642,12 +4585,10 @@ static void estimate_ref_frame_costs(const VP9_COMMON *cm,
       vp9_prob ref_comp_p  = vp9_get_pred_prob_comp_ref_p(cm, xd);
 #if CONFIG_MULTI_REF
       vp9_prob ref_comp_p1 = vp9_get_pred_prob_comp_ref_p1(cm, xd);
-#if CONFIG_LAST3_REF
       vp9_prob ref_comp_p2 = vp9_get_pred_prob_comp_ref_p2(cm, xd);
 #if CONFIG_LAST4_REF
       vp9_prob ref_comp_p3 = vp9_get_pred_prob_comp_ref_p3(cm, xd);
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
       unsigned int base_cost = vp9_cost_bit(intra_inter_p, 1);
 
@@ -4657,18 +4598,15 @@ static void estimate_ref_frame_costs(const VP9_COMMON *cm,
       ref_costs_comp[LAST_FRAME] =
 #if CONFIG_MULTI_REF
           ref_costs_comp[LAST2_FRAME] =
-#if CONFIG_LAST3_REF
           ref_costs_comp[LAST3_FRAME] =
 #if CONFIG_LAST4_REF
           ref_costs_comp[LAST4_FRAME] =
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
           ref_costs_comp[GOLDEN_FRAME] =
           ref_costs_comp[ALTREF_FRAME] = base_cost;
 
 #if CONFIG_MULTI_REF
-#if CONFIG_LAST3_REF
 #if CONFIG_LAST4_REF
       ref_costs_comp[LAST_FRAME]   += vp9_cost_bit(ref_comp_p, 0);
       ref_costs_comp[LAST2_FRAME]  += vp9_cost_bit(ref_comp_p, 0);
@@ -4695,14 +4633,6 @@ static void estimate_ref_frame_costs(const VP9_COMMON *cm,
       ref_costs_comp[LAST3_FRAME]  += vp9_cost_bit(ref_comp_p2, 0);
       ref_costs_comp[GOLDEN_FRAME] += vp9_cost_bit(ref_comp_p2, 1);
 #endif  // CONFIG_LAST4_REF
-#else  // CONFIG_LAST3_REF
-      ref_costs_comp[LAST_FRAME]   += vp9_cost_bit(ref_comp_p, 0);
-      ref_costs_comp[LAST2_FRAME]  += vp9_cost_bit(ref_comp_p, 0);
-      ref_costs_comp[GOLDEN_FRAME] += vp9_cost_bit(ref_comp_p, 1);
-
-      ref_costs_comp[LAST_FRAME]   += vp9_cost_bit(ref_comp_p1, 1);
-      ref_costs_comp[LAST2_FRAME]  += vp9_cost_bit(ref_comp_p1, 0);
-#endif  // CONFIG_LAST3_REF
 #else  // CONFIG_MULTI_REF
       ref_costs_comp[LAST_FRAME]   += vp9_cost_bit(ref_comp_p, 0);
       ref_costs_comp[GOLDEN_FRAME] += vp9_cost_bit(ref_comp_p, 1);
@@ -4711,12 +4641,10 @@ static void estimate_ref_frame_costs(const VP9_COMMON *cm,
       ref_costs_comp[LAST_FRAME]   = 512;
 #if CONFIG_MULTI_REF
       ref_costs_comp[LAST2_FRAME]  = 512;
-#if CONFIG_LAST3_REF
       ref_costs_comp[LAST3_FRAME]  = 512;
 #if CONFIG_LAST4_REF
       ref_costs_comp[LAST4_FRAME]  = 512;
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
       ref_costs_comp[GOLDEN_FRAME] = 512;
     }
@@ -6798,12 +6726,10 @@ void vp9_rd_pick_inter_mode_sb(VP9_COMP *cpi, MACROBLOCK *x,
     VP9_LAST_FLAG,
 #if CONFIG_MULTI_REF
     VP9_LAST2_FLAG,
-#if CONFIG_LAST3_REF
     VP9_LAST3_FLAG,
 #if CONFIG_LAST4_REF
     VP9_LAST4_FLAG,
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
     VP9_GOLD_FLAG,
     VP9_ALT_FLAG
@@ -6985,12 +6911,10 @@ void vp9_rd_pick_inter_mode_sb(VP9_COMP *cpi, MACROBLOCK *x,
       ref_frame_skip_mask[0] = (1 << LAST_FRAME) |
 #if CONFIG_MULTI_REF
                                (1 << LAST2_FRAME) |
-#if CONFIG_LAST3_REF
                                (1 << LAST3_FRAME) |
 #if CONFIG_LAST4_REF
                                (1 << LAST4_FRAME) |
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
                                (1 << GOLDEN_FRAME);
       ref_frame_skip_mask[1] = SECOND_REF_FRAME_MASK;
@@ -7145,7 +7069,6 @@ void vp9_rd_pick_inter_mode_sb(VP9_COMP *cpi, MACROBLOCK *x,
           ref_frame_skip_mask[0] |= LAST2_FRAME_MODE_MASK;
           ref_frame_skip_mask[1] |= SECOND_REF_FRAME_MASK;
           break;
-#if CONFIG_LAST3_REF
         case LAST3_FRAME:
           ref_frame_skip_mask[0] |= LAST3_FRAME_MODE_MASK;
           ref_frame_skip_mask[1] |= SECOND_REF_FRAME_MASK;
@@ -7156,7 +7079,6 @@ void vp9_rd_pick_inter_mode_sb(VP9_COMP *cpi, MACROBLOCK *x,
           ref_frame_skip_mask[1] |= SECOND_REF_FRAME_MASK;
           break;
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
         case GOLDEN_FRAME:
           ref_frame_skip_mask[0] |= GOLDEN_FRAME_MODE_MASK;
@@ -7183,7 +7105,6 @@ void vp9_rd_pick_inter_mode_sb(VP9_COMP *cpi, MACROBLOCK *x,
     if (cm->last_frame_type == KEY_FRAME && ref_frame == LAST2_FRAME)
       continue;
 
-#if CONFIG_LAST3_REF
     if ((cm->last2_frame_type == KEY_FRAME ||
          cm->last_frame_type == KEY_FRAME) && ref_frame == LAST3_FRAME)
       continue;
@@ -7194,7 +7115,6 @@ void vp9_rd_pick_inter_mode_sb(VP9_COMP *cpi, MACROBLOCK *x,
          cm->last_frame_type == KEY_FRAME) && ref_frame == LAST4_FRAME)
       continue;
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
 
     // Test best rd so far against threshold for trying this mode.
@@ -8557,12 +8477,10 @@ void vp9_rd_pick_inter_mode_sub8x8(VP9_COMP *cpi, MACROBLOCK *x,
     VP9_LAST_FLAG,
 #if CONFIG_MULTI_REF
     VP9_LAST2_FLAG,
-#if CONFIG_LAST3_REF
     VP9_LAST3_FLAG,
 #if CONFIG_LAST4_REF
     VP9_LAST4_FLAG,
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
     VP9_GOLD_FLAG,
     VP9_ALT_FLAG
@@ -8697,7 +8615,6 @@ void vp9_rd_pick_inter_mode_sub8x8(VP9_COMP *cpi, MACROBLOCK *x,
     if (cm->last_frame_type == KEY_FRAME && ref_frame == LAST2_FRAME)
       continue;
 
-#if CONFIG_LAST3_REF
     if ((cm->last2_frame_type == KEY_FRAME ||
          cm->last_frame_type == KEY_FRAME) && ref_frame == LAST3_FRAME)
       continue;
@@ -8708,7 +8625,6 @@ void vp9_rd_pick_inter_mode_sub8x8(VP9_COMP *cpi, MACROBLOCK *x,
          cm->last_frame_type == KEY_FRAME) && ref_frame == LAST4_FRAME)
       continue;
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
 
     // Look at the reference frame of the best mode so far and set the
@@ -8722,12 +8638,10 @@ void vp9_rd_pick_inter_mode_sub8x8(VP9_COMP *cpi, MACROBLOCK *x,
             ref_frame_skip_mask[0] |= (1 << GOLDEN_FRAME) |
 #if CONFIG_MULTI_REF
                                       (1 << LAST2_FRAME) |
-#if CONFIG_LAST3_REF
                                       (1 << LAST3_FRAME) |
 #if CONFIG_LAST4_REF
                                       (1 << LAST4_FRAME) |
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
                                       (1 << ALTREF_FRAME);
             ref_frame_skip_mask[1] |= SECOND_REF_FRAME_MASK;
@@ -8736,18 +8650,15 @@ void vp9_rd_pick_inter_mode_sub8x8(VP9_COMP *cpi, MACROBLOCK *x,
 #if CONFIG_MULTI_REF
           case LAST2_FRAME:
             ref_frame_skip_mask[0] |= (1 << LAST_FRAME) |
-#if CONFIG_LAST3_REF
                                       (1 << LAST3_FRAME) |
 #if CONFIG_LAST4_REF
                                       (1 << LAST4_FRAME) |
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
                                       (1 << GOLDEN_FRAME) |
                                       (1 << ALTREF_FRAME);
             ref_frame_skip_mask[1] |= SECOND_REF_FRAME_MASK;
             break;
 
-#if CONFIG_LAST3_REF
           case LAST3_FRAME:
             ref_frame_skip_mask[0] |= (1 << LAST_FRAME) |
                                       (1 << LAST2_FRAME) |
@@ -8769,19 +8680,16 @@ void vp9_rd_pick_inter_mode_sub8x8(VP9_COMP *cpi, MACROBLOCK *x,
             ref_frame_skip_mask[1] |= SECOND_REF_FRAME_MASK;
             break;
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
 
           case GOLDEN_FRAME:
             ref_frame_skip_mask[0] |= (1 << LAST_FRAME) |
 #if CONFIG_MULTI_REF
                                       (1 << LAST2_FRAME) |
-#if CONFIG_LAST3_REF
                                       (1 << LAST3_FRAME) |
 #if CONFIG_LAST4_REF
                                       (1 << LAST4_FRAME) |
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
                                       (1 << ALTREF_FRAME);
             ref_frame_skip_mask[1] |= SECOND_REF_FRAME_MASK;
@@ -8791,12 +8699,10 @@ void vp9_rd_pick_inter_mode_sub8x8(VP9_COMP *cpi, MACROBLOCK *x,
             ref_frame_skip_mask[0] |= (1 << LAST_FRAME) |
 #if CONFIG_MULTI_REF
                                       (1 << LAST2_FRAME) |
-#if CONFIG_LAST3_REF
                                       (1 << LAST3_FRAME) |
 #if CONFIG_LAST4_REF
                                       (1 << LAST4_FRAME) |
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
                                       (1 << GOLDEN_FRAME);
             break;
@@ -8936,14 +8842,12 @@ void vp9_rd_pick_inter_mode_sub8x8(VP9_COMP *cpi, MACROBLOCK *x,
 #if CONFIG_MULTI_REF
       this_rd_thresh = (ref_frame == LAST2_FRAME) ?
       rd_opt->threshes[segment_id][bsize][THR_LAST2] : this_rd_thresh;
-#if CONFIG_LAST3_REF
       this_rd_thresh = (ref_frame == LAST3_FRAME) ?
       rd_opt->threshes[segment_id][bsize][THR_LAST3] : this_rd_thresh;
 #if CONFIG_LAST4_REF
       this_rd_thresh = (ref_frame == LAST4_FRAME) ?
       rd_opt->threshes[segment_id][bsize][THR_LAST4] : this_rd_thresh;
 #endif  // CONFIG_LAST4_REF
-#endif  // CONFIG_LAST3_REF
 #endif  // CONFIG_MULTI_REF
       this_rd_thresh = (ref_frame == GOLDEN_FRAME) ?
       rd_opt->threshes[segment_id][bsize][THR_GOLD] : this_rd_thresh;