diff --git a/packages/core/src/components/TextField/Mask.jsx b/packages/core/src/components/TextField/Mask.jsx
index 5036795eb4..64f431233b 100644
--- a/packages/core/src/components/TextField/Mask.jsx
+++ b/packages/core/src/components/TextField/Mask.jsx
@@ -214,7 +214,7 @@ Mask.propTypes = {
  */
 export function unmask(value, mask) {
   if (!value || typeof value !== 'string') return value;
-
+  const rawValue = value;
   value = value.trim();
 
   if (mask === 'currency') {
@@ -223,6 +223,8 @@ export function unmask(value, mask) {
   } else if (Object.keys(deliminatedMaskRegex).includes(mask)) {
     // Remove the deliminators and revert to single ungrouped string
     value = toInt(value);
+  } else {
+    return rawValue;
   }
 
   return value;
diff --git a/packages/core/src/components/TextField/Mask.test.jsx b/packages/core/src/components/TextField/Mask.test.jsx
index 43a6667ae0..f555489c93 100644
--- a/packages/core/src/components/TextField/Mask.test.jsx
+++ b/packages/core/src/components/TextField/Mask.test.jsx
@@ -258,7 +258,7 @@ describe('Mask', function() {
 
 describe('unmask', () => {
   it('returns value when mask is undefined', () => {
-    expect(unmask('1,234')).toBe('1,234');
+    expect(unmask(' 1,234 Foo ')).toBe(' 1,234 Foo ');
   });
 
   it('returns value when mask is unknown', () => {