There is a part of the qatar civil code for force majeure and this would apply in this case, however, at the end of the day it will come down to whatever you signed in the beginning. Taking it down an official route such as the rental disputes committee will probably take to long, and with only a few months left, better to come to an agreement with the owner. He'll be aware you could close your account and leave and his cheques (if that's your payment method) are worthless. He could open a police case, but it's extremely unlikely. He'll just keep your deposit as the penalty.
Good luck with it.