 He was part of Winfried Schäfer's 2012 AFF Suzuki Cup, but didn't play in the tournament because he got a fever.Sinthaweechai played a friendly match against China, and he was captain in that match.In 2013, he was called up to the national team by Surachai Jaturapattarapong to the 2015 AFC Asian Cup qualification, he was chosen by the coach as captain.