2023 Challenger Banque Nationale de Drummondville – Singles

Vasek Pospisil was the defending champion but chose not to defend his title.

Zizou Bergs won the title after defeating James Duckworth 6–4, 7–5 in the final.

Seeds
• # 🇩🇪 Dominik Koepfer (quarterfinals)

• # 🇦🇺 James Duckworth (final)

• # 🇫🇷 Benoît Paire (second round)

• # 🇨🇦 Gabriel Diallo (withdrew)

• # 🇬🇧 Ryan Peniston (quarterfinals)

• # 🇧🇪 Zizou Bergs (champion)

• # 🇨🇦 Alexis Galarneau (second round)

• # 🇹🇳 Aziz Dougaz (quarterfinals)