Visual Studio 2015 Update 3 Offline Installer ((better)) -

Microsoft still hosts the ISO files on its content delivery network (CDN). You can use the following verified direct links to download the ISO for different editions. These links are permanent and come directly from download.microsoft.com , ensuring they are safe and authentic.

If you manage to obtain an ISO from a third party, never run it without verifying integrity. Below are the official hashes for (as provided by Microsoft in 2016 – verify with current documentation). visual studio 2015 update 3 offline installer

The definitive guide to downloading and installing using the complete offline installer (ISO). Microsoft still hosts the ISO files on its