I am an Iranian CS student. I had a fully funded PhD admission at one of the US universities. I was admitted for the Fall 2016 semester. I am currently in Iran due to my visa not being issued despite the 7 months I have waited for it. I was able to defer my admission to Spring 2017 semester, but then _this_ happened. I am quite sure that I will never be able to attend this program. I had very high hopes for my future…
Canada, Australia and New Zealand are viable options for me, and I've already been invited by 2 of these countries.
Don't be disheartened. You're smart (you got a fully funded PhD), and the world is very big, with many opportunities. Good luck!