diff --git a/packages/apidom-ls/src/config/codes.ts b/packages/apidom-ls/src/config/codes.ts
index 330b6fdbb1..c9a784719c 100644
--- a/packages/apidom-ls/src/config/codes.ts
+++ b/packages/apidom-ls/src/config/codes.ts
@@ -743,6 +743,7 @@ enum ApilintCodes {
   OPENAPI3_0_PARAMETER_FIELD_EXPLODE_TYPE = 5150700,
   OPENAPI3_0_PARAMETER_FIELD_ALLOW_RESERVED_TYPE = 5150800,
   OPENAPI3_0_PARAMETER_FIELD_SCHEMA_TYPE = 5150900,
+  OPENAPI3_0_PARAMETER_FIELD_SCHEMA_MUTUALLY_EXCLUSIVE,
   OPENAPI3_0_PARAMETER_FIELD_EXAMPLES_VALUES_TYPE = 5151000,
   OPENAPI3_0_PARAMETER_FIELD_EXAMPLES_MUTUALLY_EXCLUSIVE,
   OPENAPI3_0_PARAMETER_FIELD_CONTENT_VALUES_TYPE = 5151100,
diff --git a/packages/apidom-ls/src/config/openapi/parameter/lint/index.ts b/packages/apidom-ls/src/config/openapi/parameter/lint/index.ts
index 80db824dc6..da3e819b02 100644
--- a/packages/apidom-ls/src/config/openapi/parameter/lint/index.ts
+++ b/packages/apidom-ls/src/config/openapi/parameter/lint/index.ts
@@ -14,6 +14,7 @@ import styleTypeLint from './style--type';
 import explodeTypeLint from './explode--type';
 import allowReservedTypeLint from './allow-reserved--type';
 import schemaTypeLint from './schema--type';
+import schemaMutuallyExclusiveLint from './schema--mutually-exclusive';
 import examplesValuesTypeLint from './examples--values-type';
 import examplesMutuallyExclusiveLint from './examples--mutually-exclusive';
 import contentValuesTypeLint from './content--values-type';
@@ -33,6 +34,7 @@ const lints = [
   explodeTypeLint,
   allowReservedTypeLint,
   schemaTypeLint,
+  schemaMutuallyExclusiveLint,
   examplesValuesTypeLint,
   examplesMutuallyExclusiveLint,
   contentValuesTypeLint,
diff --git a/packages/apidom-ls/src/config/openapi/parameter/lint/schema--mutually-exclusive.ts b/packages/apidom-ls/src/config/openapi/parameter/lint/schema--mutually-exclusive.ts
new file mode 100644
index 0000000000..d15c64c6a7
--- /dev/null
+++ b/packages/apidom-ls/src/config/openapi/parameter/lint/schema--mutually-exclusive.ts
@@ -0,0 +1,23 @@
+import { DiagnosticSeverity } from 'vscode-languageserver-types';
+
+import ApilintCodes from '../../../codes';
+import { LinterMeta } from '../../../../apidom-language-types';
+
+const schemaMutuallyExclusiveLint: LinterMeta = {
+  code: ApilintCodes.OPENAPI3_0_PARAMETER_FIELD_SCHEMA_MUTUALLY_EXCLUSIVE,
+  source: 'apilint',
+  message: 'The `schema` field and `content` field are mutually exclusive.',
+  severity: DiagnosticSeverity.Error,
+  linterFunction: 'missingFields',
+  linterParams: [['schema']],
+  marker: 'key',
+  markerTarget: 'schema',
+  conditions: [
+    {
+      function: 'existFields',
+      params: [['content']],
+    },
+  ],
+};
+
+export default schemaMutuallyExclusiveLint;