Thantub Suksumrarn (, born 18 May 2001) is a Thai tennis player. Suksumrarn has a career high ATP singles ranking of No. 950 achieved on 1 December 2025 and a career high ATP doubles ranking of No. 522 achieved on 30 March 2026.
Suksumrarn has won two ITF doubles titles.
Suksumrarn represents Thailand at the Davis Cup, where he has a W/L record of 1âÂÂ0.