diff --git a/ets2panda/parser/ETSparserStatements.cpp b/ets2panda/parser/ETSparserStatements.cpp
index 0b8fc5d913c0f2c867bf736981280e7a1a63ff8f..1665d4b1a5c000d98762826dbf2048f0f9f46c6e 100644
--- a/ets2panda/parser/ETSparserStatements.cpp
+++ b/ets2panda/parser/ETSparserStatements.cpp
@@ -323,7 +323,7 @@ bool ETSParser::ValidateLabeledStatement(lexer::TokenType type)
 
 bool ETSParser::ValidateForInStatement()
 {
-    LogUnexpectedToken(lexer::TokenType::KEYW_IN);
+    LogError(diagnostic::ERROR_ARKTS_NO_FOR_IN_LOOP);
     return false;
 }
 
diff --git a/ets2panda/test/ast/parser/ets/FixedArray/InvalidStatements3.ets b/ets2panda/test/ast/parser/ets/FixedArray/InvalidStatements3.ets
index 29c5aced21a30e34d933b5f39f6f9a22d678e5e1..ef5fb160524f486bcf001ae132a3c0868e648940 100644
--- a/ets2panda/test/ast/parser/ets/FixedArray/InvalidStatements3.ets
+++ b/ets2panda/test/ast/parser/ets/FixedArray/InvalidStatements3.ets
@@ -60,4 +60,4 @@ for (let i = 1 in [0, 1, 2]) {}
 /* @@? 38:13 Error SyntaxError: Unexpected token '@'. */
 /* @@? 38:14 Error TypeError: Cannot find type 'annotate'. */
 /* @@? 42:16 Error SyntaxError: for-in loop variable declaration may not have an initializer. */
-/* @@? 42:16 Error SyntaxError: Unexpected token 'in'. */
+/* @@? 42:16 Error SyntaxError: 'for ... in' loop is not supported, please use regular 'for' or 'for ... of ...' loop to iterate through arrays and iterable objects. */
diff --git a/ets2panda/test/ast/parser/ets/InvalidStatements3.ets b/ets2panda/test/ast/parser/ets/InvalidStatements3.ets
index 85b2082bf489c9042642d5a0d34628fbc8c180d6..308ab7542c9dc3dca8077fb5dfc665065e625eba 100644
--- a/ets2panda/test/ast/parser/ets/InvalidStatements3.ets
+++ b/ets2panda/test/ast/parser/ets/InvalidStatements3.ets
@@ -55,9 +55,9 @@ for (let i = 1 in [0, 1, 2]) {}
 /* @@? 31:9 Error SyntaxError: Unexpected token 'let'. */
 /* @@? 31:13 Error SyntaxError: Unexpected token 'x'. */
 /* @@? 34:5 Error SyntaxError: Illegal 'use strict' directive in function with non-simple parameter list. */
-/* @@? 38:5 Error SyntaxError: Unexpected token 'private'. */
 /* @@? 38:5 Error SyntaxError: Annotation declaration can not have access modifier. */
+/* @@? 38:5 Error SyntaxError: Unexpected token 'private'. */
 /* @@? 38:13 Error SyntaxError: Unexpected token '@'. */
 /* @@? 38:14 Error TypeError: Cannot find type 'annotate'. */
 /* @@? 42:16 Error SyntaxError: for-in loop variable declaration may not have an initializer. */
-/* @@? 42:16 Error SyntaxError: Unexpected token 'in'. */
+/* @@? 42:16 Error SyntaxError: 'for ... in' loop is not supported, please use regular 'for' or 'for ... of ...' loop to iterate through arrays and iterable objects. */
diff --git a/ets2panda/test/ast/parser/ets/for_in.ets b/ets2panda/test/ast/parser/ets/for_in.ets
new file mode 100644
index 0000000000000000000000000000000000000000..922bde17d5a79170a098ebc31071f129909015d2
--- /dev/null
+++ b/ets2panda/test/ast/parser/ets/for_in.ets
@@ -0,0 +1,22 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * 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.
+ */
+
+let a: number[] = [1.0, 2.0, 3.0]
+for (let i /* @@ label */in a) {
+}
+
+/* @@@ label Error SyntaxError: Variable must be initialized or it's type must be declared. */
+/* @@@ label Error SyntaxError: 'for ... in' loop is not supported, please use regular 'for' or 'for ... of ...' loop to iterate through arrays
+    and iterable objects. */
diff --git a/ets2panda/util/diagnostic/syntax.yaml b/ets2panda/util/diagnostic/syntax.yaml
index a998b7eacc637388b76862e1f7d1c186d3e43878..36dbf07b186320f8d648b0b52959039dbced5894 100644
--- a/ets2panda/util/diagnostic/syntax.yaml
+++ b/ets2panda/util/diagnostic/syntax.yaml
@@ -213,6 +213,11 @@ syntax:
   id: 307
   message: "'export = ...' syntax is not supported, use regular import/export instead!"
 
+- name: ERROR_ARKTS_NO_FOR_IN_LOOP
+  id: 6987
+  message: "'for ... in' loop is not supported, please use regular 'for' or 'for ... of ...' loop to iterate through arrays
+    and iterable objects."
+
 - name: ERROR_ARKTS_NO_IMPORT_ASSERTIONS
   id: 313
   message: "Import assertion is not supported, please use the ordinary import syntax instead!"