Microsoft released a new patch for Visual Studio 2015 Update 3, pushing the IDE build version no. to: 14.0.25431.01. This is the fifth cumulative update for VS2015 Update 3 covering fixes for high-impact bugs noticed by product team and the community.
If you are using Visual Studio 2015 Update 3, you should download this patch (optional) and install it on your development environment to have a smooth IDE experience.