ФИБА Европа
Mutaf was a regular member of the junior national teams of Turkey. With the Turkish junior national teams, he played at the following tournaments: the 2007 FIBA Europe Under-16 Championship, the 2008 FIBA Europe Under-18 Championship, the 2009 FIBA Europe Under-18 Championship, where he won a bronze medal, the 2010 FIBA Europe Under-20 Championship, and at the 2011 FIBA Europe Under-20 Championship.