See main article: 2021 Antalya Challenger III.
Denys Molchanov and Aleksandr Nedovyesov were the defending champions[1] but chose not to defend their title.
Riccardo Bonadio and Giovanni Fonio won the title after defeating Hsu Yu-hsiou and Tseng Chun-hsin 3–6, 6–2, [12–10] in the final.