diff --git a/snippets/symmetricDifference.md b/snippets/symmetricDifference.md
index 6f13806e4..854af0f30 100644
--- a/snippets/symmetricDifference.md
+++ b/snippets/symmetricDifference.md
@@ -1,6 +1,6 @@
 ### symmetricDifference
 
-Returns the symmetric difference between two arrays.
+Returns the symmetric difference between two arrays, without filtering out duplicate values.
 
 Create a `Set` from each array, then use `Array.filter()` on each of them to only keep values not contained in the other.
 
@@ -13,5 +13,6 @@ const symmetricDifference = (a, b) => {
 ```
 
 ```js
-symmetricDifference([1, 2, 3], [1, 2, 4]); // [3,4]
+symmetricDifference([1, 2, 3], [1, 2, 4]); // [3, 4]
+symmetricDifference([1, 2, 2], [1, 3, 1]); // [2, 2, 3]
 ```
diff --git a/snippets/uniqueSymmetricDifference.md b/snippets/uniqueSymmetricDifference.md
new file mode 100644
index 000000000..99afdadfe
--- /dev/null
+++ b/snippets/uniqueSymmetricDifference.md
@@ -0,0 +1,16 @@
+### uniqueSymmetricDifference
+
+Returns the unique symmetric difference between two arrays, not containing duplicate values from either array.
+
+Use `Array.filter()` and `Array.includes()` on each array to remove values contained in the other, then create a `Set` from the results, removing duplicate values.
+
+```js
+const uniqueSymmetricDifference = (a, b) => [
+  ...new Set([...a.filter(v => !b.includes(v)), ...b.filter(v => !a.includes(v))])
+];
+```
+
+```js
+uniqueSymmetricDifference([1, 2, 3], [1, 2, 4]); // [3, 4]
+uniqueSymmetricDifference([1, 2, 2], [1, 3, 1]); // [2, 3]
+```
diff --git a/tag_database b/tag_database
index 92f0c81ad..25701b373 100644
--- a/tag_database
+++ b/tag_database
@@ -302,6 +302,7 @@ unionWith:array,function
 uniqueElements:array
 uniqueElementsBy:array,function
 uniqueElementsByRight:array,function
+uniqueSymmetricDifference:array,math
 untildify:node,string
 unzip:array
 unzipWith:array,function,advanced
diff --git a/test/symmetricDifference/symmetricDifference.test.js b/test/symmetricDifference/symmetricDifference.test.js
index 7fc364488..c96e3b5a6 100644
--- a/test/symmetricDifference/symmetricDifference.test.js
+++ b/test/symmetricDifference/symmetricDifference.test.js
@@ -7,3 +7,6 @@ test('symmetricDifference is a Function', () => {
 test('Returns the symmetric difference between two arrays.', () => {
   expect(symmetricDifference([1, 2, 3], [1, 2, 4])).toEqual([3, 4]);
 });
+test('Returns duplicates from one array', () => {
+  expect(symmetricDifference([1, 2, 2], [1, 3, 1])).toEqual([2, 2, 3]);
+});
diff --git a/test/uniqueSymmetricDifference/uniqueSymmetricDifference.js b/test/uniqueSymmetricDifference/uniqueSymmetricDifference.js
new file mode 100644
index 000000000..62cb18a5f
--- /dev/null
+++ b/test/uniqueSymmetricDifference/uniqueSymmetricDifference.js
@@ -0,0 +1,4 @@
+const uniqueSymmetricDifference = (a, b) => [
+  ...new Set([...a.filter(v => !b.includes(v)), ...b.filter(v => !a.includes(v))])
+];
+module.exports = uniqueSymmetricDifference;
diff --git a/test/uniqueSymmetricDifference/uniqueSymmetricDifference.test.js b/test/uniqueSymmetricDifference/uniqueSymmetricDifference.test.js
new file mode 100644
index 000000000..788d1f65e
--- /dev/null
+++ b/test/uniqueSymmetricDifference/uniqueSymmetricDifference.test.js
@@ -0,0 +1,12 @@
+const expect = require('expect');
+const uniqueSymmetricDifference = require('./uniqueSymmetricDifference.js');
+
+test('uniqueSymmetricDifference is a Function', () => {
+  expect(uniqueSymmetricDifference).toBeInstanceOf(Function);
+});
+test('Returns the symmetric difference between two arrays.', () => {
+  expect(uniqueSymmetricDifference([1, 2, 3], [1, 2, 4])).toEqual([3, 4]);
+});
+test('Does not return duplicates from one array', () => {
+  expect(uniqueSymmetricDifference([1, 2, 2], [1, 3, 1])).toEqual([2, 3]);
+});