I think he has 2 years left on his contract, but there is some clause that he can left Caja Laboral for any NBA team. I am not 100% sure, but Nets trying to sign him, and i am sure he is prepared for NBA now. Many articles in my country are saying about it, about interest from several NBA teams, and i think he could be signed for something about 3-4 million per year, like his salary is right now, and i am sure that we cant sign better player for that amount of money (except rookies but they are not for free or some old vets like Ray Allen, but Allen type of players doesnt coming to our team).
Here is what i find out
Mirza Teletovic, Caja Laboral, News, Stats, Rumors, Awards - RealGM he is like Unrestricted Free Agent for every NBA team.
Edit: I am 99% sure that his contract with Caja Laboral is expired, i just red article about his contract status from 1 Bosnian reporter.