diff --git a/packages/components/src/form-token-field/index.tsx b/packages/components/src/form-token-field/index.tsx
index 987c75d769b727..88c683e0e0ba86 100644
--- a/packages/components/src/form-token-field/index.tsx
+++ b/packages/components/src/form-token-field/index.tsx
@@ -235,7 +235,12 @@ export function FormTokenField( props: FormTokenFieldProps ) {
 				break;
 			case 'Space':
 				if ( tokenizeOnSpace ) {
-					preventDefault = addCurrentToken();
+					if (
+						inputHasValidValue() &&
+						__experimentalValidateInput( incompleteTokenValue )
+					) {
+						preventDefault = addCurrentToken();
+					}
 				}
 				break;
 			case 'Escape':