I can't complete Mission 3, too. Whatever I do, at the end of the Mission, the F-16 get shot down by the SAMs and the Mission fails. I had the same Problem with some of the missions in the original F-15 campaign.
*EDIT* I uploaded a tacview file. You can see the F-16 suicide from minute 40.
https://www.dropbox.com/s/h13xtia7fjsev6q/Tacview-20160925-152047-DCS.zip.acmi?dl=0