 Following the qualification of the Chilean national youth team to the 2005 FIFA World Youth Championship, he was in the 23-man squad to play the world championship, but he didn't play during the tournament.Six years after his participation with the U-20 team, on 7 September 2011, Díaz was called up by Claudio Borghi to play in the 2014 World Cup qualification against Uruguay and Paraguay, in place of Carlos Carmona, who was banned for his participation in the scandal of "Bautizazo".On 11 November, Díaz officially debuted for the Chile senior team in a 4–0 away loss at Centenario Stadium, being replaced by Milovan Mirosevic in the 61st minute.