diff --git a/ejercicio3.js b/ejercicio3.js
new file mode 100644
index 0000000..a17985c
--- /dev/null
+++ b/ejercicio3.js
@@ -0,0 +1,9 @@
+let promise = new Promise(function (fulfill, reject) {
+    setTimeout(()=>reject(new Error("REJECTED!")),300)
+  });
+  
+  function onReject (error) {
+    console.log(error.message)
+  }
+  
+  promise.then(null,onReject);
\ No newline at end of file