diff --git a/.vscode/tasks.json b/.vscode/tasks.json
index f027524374..d1f141cced 100644
--- a/.vscode/tasks.json
+++ b/.vscode/tasks.json
@@ -220,6 +220,7 @@
                 "Invariants",
                 "Iterators",
                 "Lambdas",
+                "Language1",
                 "Literals",
                 "Loops",
                 "Macros",
diff --git a/c/misra/src/rules/DIR-4-3/LanguageNotEncapsulatedAndIsolated.ql b/c/misra/src/rules/DIR-4-3/LanguageNotEncapsulatedAndIsolated.ql
new file mode 100644
index 0000000000..fb9f00e9c4
--- /dev/null
+++ b/c/misra/src/rules/DIR-4-3/LanguageNotEncapsulatedAndIsolated.ql
@@ -0,0 +1,28 @@
+/**
+ * @id c/misra/language-not-encapsulated-and-isolated
+ * @name DIR-4-3: Assembly language shall be encapsulated and isolated
+ * @description Failing to encapsulate assembly language limits the portability, reliability, and
+ *              readability of programs.
+ * @kind problem
+ * @precision very-high
+ * @problem.severity error
+ * @tags external/misra/id/dir-4-3
+ *       maintainability
+ *       readability
+ *       external/misra/obligation/required
+ */
+
+import cpp
+import codingstandards.c.misra
+
+from AsmStmt asm
+where
+  not isExcluded(asm, Language1Package::languageNotEncapsulatedAndIsolatedQuery()) and
+  not exists(asm.getEnclosingFunction())
+  or
+  // in concept statements within the body constitute intermingling assembly,
+  // rather than expressions and are more general.
+  exists(Stmt sp | sp = asm.getEnclosingFunction().getEntryPoint().getASuccessor*() |
+    not sp instanceof AsmStmt and not sp instanceof ReturnStmt and not sp instanceof BlockStmt
+  )
+select asm, "Usage of non-isolated and non-encapsulated assembly language."
diff --git a/c/misra/test/rules/DIR-4-3/LanguageNotEncapsulatedAndIsolated.expected b/c/misra/test/rules/DIR-4-3/LanguageNotEncapsulatedAndIsolated.expected
new file mode 100644
index 0000000000..04304fa22b
--- /dev/null
+++ b/c/misra/test/rules/DIR-4-3/LanguageNotEncapsulatedAndIsolated.expected
@@ -0,0 +1,5 @@
+| test.c:6:3:6:5 | asm statement | Usage of non-isolated and non-encapsulated assembly language. |
+| test.c:11:3:11:5 | asm statement | Usage of non-isolated and non-encapsulated assembly language. |
+| test.c:32:3:32:5 | asm statement | Usage of non-isolated and non-encapsulated assembly language. |
+| test.c:37:3:37:5 | asm statement | Usage of non-isolated and non-encapsulated assembly language. |
+| test.c:58:3:58:5 | asm statement | Usage of non-isolated and non-encapsulated assembly language. |
diff --git a/c/misra/test/rules/DIR-4-3/LanguageNotEncapsulatedAndIsolated.qlref b/c/misra/test/rules/DIR-4-3/LanguageNotEncapsulatedAndIsolated.qlref
new file mode 100644
index 0000000000..df3d8afc8c
--- /dev/null
+++ b/c/misra/test/rules/DIR-4-3/LanguageNotEncapsulatedAndIsolated.qlref
@@ -0,0 +1 @@
+rules/DIR-4-3/LanguageNotEncapsulatedAndIsolated.ql
\ No newline at end of file
diff --git a/c/misra/test/rules/DIR-4-3/test.c b/c/misra/test/rules/DIR-4-3/test.c
new file mode 100644
index 0000000000..c031f2ab8a
--- /dev/null
+++ b/c/misra/test/rules/DIR-4-3/test.c
@@ -0,0 +1,80 @@
+#define N1 asm("HCF")
+#define N2 __asm__("HCF")
+
+void f1() {
+  int a;
+  N1; // NON_COMPLIANT
+}
+
+void f2() {
+  int a;
+  N2; // NON_COMPLIANT
+}
+
+void f3() {
+  N1; // COMPLIANT
+}
+
+void f4() {
+  N2; // COMPLIANT
+}
+
+void f5() {
+  __asm__("HCF"); // COMPLIANT
+}
+
+void f6() {
+  asm("HCF"); // COMPLIANT
+}
+
+inline void f7() {
+  int a;
+  N1; // NON_COMPLIANT
+}
+
+inline void f8() {
+  int a;
+  N2; // NON_COMPLIANT
+}
+
+inline void f9() {
+  N1; // COMPLIANT
+}
+
+inline void f10() {
+  N2; // COMPLIANT
+}
+
+inline void f11() {
+  __asm__("HCF"); // COMPLIANT
+}
+
+inline void f12() {
+  asm("HCF"); // COMPLIANT
+}
+
+inline int f13() {
+  int a;
+  N2; // NON_COMPLIANT
+  return 0;
+}
+
+inline int f14() {
+  N1; // COMPLIANT
+  return 0;
+}
+
+inline int f15() {
+  N2; // COMPLIANT
+  return 0;
+}
+
+inline int f16() {
+  __asm__("HCF"); // COMPLIANT
+  return 0;
+}
+
+inline int f17() {
+  asm("HCF"); // COMPLIANT
+  return 0;
+}
\ No newline at end of file
diff --git a/cpp/common/src/codingstandards/cpp/exclusions/c/Language1.qll b/cpp/common/src/codingstandards/cpp/exclusions/c/Language1.qll
new file mode 100644
index 0000000000..a2787698cc
--- /dev/null
+++ b/cpp/common/src/codingstandards/cpp/exclusions/c/Language1.qll
@@ -0,0 +1,25 @@
+//** THIS FILE IS AUTOGENERATED, DO NOT MODIFY DIRECTLY.  **/
+import cpp
+import RuleMetadata
+import codingstandards.cpp.exclusions.RuleMetadata
+
+newtype Language1Query = TLanguageNotEncapsulatedAndIsolatedQuery()
+
+predicate isLanguage1QueryMetadata(Query query, string queryId, string ruleId) {
+  query =
+    // `Query` instance for the `languageNotEncapsulatedAndIsolated` query
+    Language1Package::languageNotEncapsulatedAndIsolatedQuery() and
+  queryId =
+    // `@id` for the `languageNotEncapsulatedAndIsolated` query
+    "c/misra/language-not-encapsulated-and-isolated" and
+  ruleId = "DIR-4-3"
+}
+
+module Language1Package {
+  Query languageNotEncapsulatedAndIsolatedQuery() {
+    //autogenerate `Query` type
+    result =
+      // `Query` type for `languageNotEncapsulatedAndIsolated` query
+      TQueryC(TLanguage1PackageQuery(TLanguageNotEncapsulatedAndIsolatedQuery()))
+  }
+}
diff --git a/cpp/common/src/codingstandards/cpp/exclusions/c/RuleMetadata.qll b/cpp/common/src/codingstandards/cpp/exclusions/c/RuleMetadata.qll
index 4664c7df34..3f7f68057b 100644
--- a/cpp/common/src/codingstandards/cpp/exclusions/c/RuleMetadata.qll
+++ b/cpp/common/src/codingstandards/cpp/exclusions/c/RuleMetadata.qll
@@ -18,6 +18,7 @@ import IO1
 import IO2
 import IO3
 import IO4
+import Language1
 import Misc
 import Pointers1
 import Pointers2
@@ -51,6 +52,7 @@ newtype TCQuery =
   TIO2PackageQuery(IO2Query q) or
   TIO3PackageQuery(IO3Query q) or
   TIO4PackageQuery(IO4Query q) or
+  TLanguage1PackageQuery(Language1Query q) or
   TMiscPackageQuery(MiscQuery q) or
   TPointers1PackageQuery(Pointers1Query q) or
   TPointers2PackageQuery(Pointers2Query q) or
@@ -84,6 +86,7 @@ predicate isQueryMetadata(Query query, string queryId, string ruleId) {
   isIO2QueryMetadata(query, queryId, ruleId) or
   isIO3QueryMetadata(query, queryId, ruleId) or
   isIO4QueryMetadata(query, queryId, ruleId) or
+  isLanguage1QueryMetadata(query, queryId, ruleId) or
   isMiscQueryMetadata(query, queryId, ruleId) or
   isPointers1QueryMetadata(query, queryId, ruleId) or
   isPointers2QueryMetadata(query, queryId, ruleId) or
diff --git a/rule_packages/c/Language1.json b/rule_packages/c/Language1.json
new file mode 100644
index 0000000000..50aed45c55
--- /dev/null
+++ b/rule_packages/c/Language1.json
@@ -0,0 +1,24 @@
+{
+  "MISRA-C-2012": {
+    "DIR-4-3": {
+      "properties": {
+        "obligation": "required"
+      },
+      "queries": [
+        {
+          "description": "Failing to encapsulate assembly language limits the portability, reliability, and readability of programs.",
+          "kind": "problem",
+          "name": "Assembly language shall be encapsulated and isolated",
+          "precision": "very-high",
+          "severity": "error",
+          "short_name": "LanguageNotEncapsulatedAndIsolated",
+          "tags": [
+            "maintainability",
+            "readability" 
+          ]
+        }
+      ],
+      "title": "Assembly language shall be encapsulated and isolated"
+    }
+  }
+}
\ No newline at end of file
diff --git a/rules.csv b/rules.csv
index cb14aec2c0..0e771b8548 100755
--- a/rules.csv
+++ b/rules.csv
@@ -604,7 +604,7 @@ c,MISRA-C-2012,RULE-2-1,Yes,Required,,,All source files shall compile without an
 c,MISRA-C-2012,RULE-3-1,No,Required,,,All code shall be traceable to documented requirements,,,,
 c,MISRA-C-2012,RULE-4-1,No,Required,,,Run-time failures shall be minimized,,,,
 c,MISRA-C-2012,RULE-4-2,Yes,Advisory,,,All usage of assembly language should be documented,M7-4-1,Language,Import,
-c,MISRA-C-2012,RULE-4-3,Yes,Required,,,Assembly language shall be encapsulated and isolated,,Language,Medium,
+c,MISRA-C-2012,DIR-4-3,Yes,Required,,,Assembly language shall be encapsulated and isolated,,Language1,Medium,
 c,MISRA-C-2012,RULE-4-4,Yes,Advisory,,,Sections of code should not be commented out,A2-7-2,Syntax,Import,
 c,MISRA-C-2012,DIR-4-5,Yes,Advisory,,,Identifiers in the same name space with overlapping visibility should be typographically unambiguous,M2-10-1,Syntax,Easy,
 c,MISRA-C-2012,RULE-4-6,Yes,Advisory,,,typedefs that indicate size and signedness should be used in place of the basic numerical types,,Types,Hard,