2024 Nonthaburi Challenger III – Singles

Valentin Vacherot was the two-time defending champion but chose not to defend his title.

Matteo Gigante won the title after defeating Hong Seong-chan 6–4, 6–1 in the final.

Seeds
• # Duje Ajduković (quarterfinals)

• # 🇩🇪 Benjamin Hassan (second round)

• # 🇯🇵 Sho Shimabukuro (second round)

• # Gijs Brouwer (first round)

• # 🇨🇿 Dalibor Svrčina (withdrew)

• # 🇺🇦 Vitaliy Sachko (first round, retired)

• # 🇮🇹 Matteo Gigante (champion)

• # 🇮🇹 Mattia Bellucci (first round)