2023 Iași Open – Men's singles

Felipe Meligeni Alves was the defending champion but chose not to defend his title.

Hugo Gaston won the title after defeating Bernabé Zapata Miralles 3–6, 6–0, 6–4 in the final.

Seeds
• # 🇪🇸 Bernabé Zapata Miralles (final)

• # 🇲🇩 Radu Albot (first round)

• # 🇨🇿 Tomáš Macháč (first round, retired)

• # 🇭🇺 Zsombor Piros (first round)

• # Cristian Garín (semifinals)

• # 🇫🇷 Hugo Gaston (champion)

• # 🇫🇷 Enzo Couacaud (first round)

• # 🇨🇿 Zdeněk Kolář (second round)