Some time ago the mirrors appeared iso images of the stable release to download the Linux Mint 17.3 “Rosa” Cinnamon and MATE.
The developers of Linux Mint have abandoned short term releases in favor of long-term, thereby already released updates of Linux Mint 17.1, 17.2 and 17.3. Next, the new long term release LTS Linux Mint 18 will be based on Ubuntu 16.04 LTS.
Download Linux Mint 17.3 “Rosa” stable Cinnamon and MATE. at the following link: