Dear Nita,
What is holding up his marriage? I can see that he should have got married in between Aug 2011 to Aug 2012. Was there any close touch and go situation or was he involved in any love affairs.
The next possible chance is there only after 2016. If you need a full scientific evaluation of his horoscope, do come through https://astrologymag.com/store?catid=4
Best of luck