Thantub Suksumrarn (, born 18 May 2001) is a Thai tennis player. Suksumrarn has a career high ATP singles ranking of No. 923 achieved on 4 May 2026 and a career high ATP doubles ranking of No. 466 achieved on 13 July 2026.

Suksumrarn has won two ITF doubles titles.

Suksumrarn represents Thailand at the Davis Cup, where he has a W/L record of 1–0.

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