[2] He won the men's singles title at the 2012 Singapore International Series when he was 17.

[3] Thammasin was part of the Thailand national team that clinched the bronze medal at the 2019 Sudirman Cup.

His best achievement in the individual event was becoming the champion at the BWF World Tour Super 300 2019 Macau Open.

[4] Men's singles Boys' singles The BWF World Tour, which was announced on 19 March 2017 and implemented in 2018,[5] is a series of elite badminton tournaments sanctioned by the Badminton World Federation (BWF).

This biographical article relating to Thai badminton is a stub.