diff --git a/jerry-core/parser/js/js-parser-expr.c b/jerry-core/parser/js/js-parser-expr.c
index c54209fc3..fcc9e2962 100644
--- a/jerry-core/parser/js/js-parser-expr.c
+++ b/jerry-core/parser/js/js-parser-expr.c
@@ -2934,9 +2934,13 @@ parser_parse_initializer_by_next_char (parser_context_t *context_p, /**< context
 
 /**
  * Process ternary expression.
+ *
+ * @return true - continue with primary expression parsing
+ *         false - otherwise
  */
-static void
-parser_process_ternary_expression (parser_context_t *context_p) /**< context */
+static bool
+parser_process_ternary_expression (parser_context_t *context_p, /**< context */
+                                   size_t grouping_level) /**< grouping level */
 {
   JERRY_ASSERT (context_p->token.type == LEXER_QUESTION_MARK);
 
@@ -2978,6 +2982,9 @@ parser_process_ternary_expression (parser_context_t *context_p) /**< context */
   /* Last opcode rewrite is not allowed because
    * the result may come from the first branch. */
   parser_flush_cbc (context_p);
+
+  parser_process_binary_opcodes (context_p, 0);
+  return grouping_level >= PARSER_GROUPING_LEVEL_INCREASE;
 } /* parser_process_ternary_expression */
 
 /**
@@ -3122,9 +3129,9 @@ process_unary_expression:
       }
 
       if (JERRY_UNLIKELY (context_p->token.type == LEXER_QUESTION_MARK)
-          && (grouping_level != PARSE_EXPR_LEFT_HAND_SIDE))
+          && (grouping_level != PARSE_EXPR_LEFT_HAND_SIDE)
+          && parser_process_ternary_expression (context_p, grouping_level))
       {
-        parser_process_ternary_expression (context_p);
         continue;
       }
       break;
diff --git a/tests/jerry/regression-test-issue-3553.js b/tests/jerry/regression-test-issue-3553.js
new file mode 100644
index 000000000..43e00fe20
--- /dev/null
+++ b/tests/jerry/regression-test-issue-3553.js
@@ -0,0 +1,22 @@
+// Copyright JS Foundation and other contributors, http://js.foundation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+var src = "0?0:0+++++0";
+
+try {
+  eval (src);
+  assert (false);
+} catch (e) {
+  assert (e instanceof SyntaxError);
+}
diff --git a/tests/jerry/regression-test-issue-3608.js b/tests/jerry/regression-test-issue-3608.js
new file mode 100644
index 000000000..65ad62bf4
--- /dev/null
+++ b/tests/jerry/regression-test-issue-3608.js
@@ -0,0 +1,22 @@
+// Copyright JS Foundation and other contributors, http://js.foundation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+var src = "function $() { return $ ? $ : $ * $++() } switch ($) {}";
+
+try {
+  eval (src);
+  assert (false);
+} catch (e) {
+  assert (e instanceof SyntaxError);
+}