You can remove CleanMyMac 3 is by simply dragging it to the Trash. However, by doing this, as with removing any other app, it will leave application leftovers on your Mac.
It is recommended to use the Uninstaller module of CleanMyMac 3 for complete removal. And here's how you do that:
We will be pleased if you drop us a note why you've decided not to use the application further and uninstall it from your Mac.