| Nonthaburi Challenger | |
|---|---|
 2025 Nonthaburi Challenger III | |
| ATP Challenger Tour | |
| Location | Lawn Tennis Association of Thailand, Nonthaburi, Thailand |
| Category | ATP Challenger Tour |
| Surface | Hard |
| Website | Website |
The Nonthaburi Challenger is a professional tennis tournament played on hard courts. It is currently part of the Association of Tennis Professionals (ATP) Challenger Tour. It has been held in Nonthaburi province, Thailand since 2022.
| Year | Champion | Runner-up | Score |
|---|---|---|---|
| 2022 (1) |  Valentin Vacherot |  Lý Hoàng Nam | 6–3, 7–6(7–4) |
| 2022 (2) |  Arthur Cazaux |  Omar Jasika | 7–6(8–6), 6–4 |
| 2022 (3) |  Stuart Parker | Arthur Cazaux | 6–4, 4–1 ret. |
| 2023 (1) |  Dennis Novak |  Wu Tung-lin | 6–4, 6–4 |
| 2023 (2) | Arthur Cazaux |  Lloyd Harris | 7–6(7–5), 6–2 |
| 2023 (3) |  Sho Shimabukuro | Arthur Cazaux | 6–2, 7–5 |
| 2024 (1) | Valentin Vacherot | Lucas Pouille | 3–2 ret. |
| 2024 (2) | Valentin Vacherot | Manuel Guinard | 7–5, 7–6(7–4) |
| 2024 (3) |  Matteo Gigante |  Hong Seong-chan | 6–4, 6–1 |
| 2024 (4) [1] | Wu Tung-lin |  Mackenzie McDonald | 6–3, 7–6(7–4) |
| 2025 (1) |  Aslan Karatsev | Grégoire Barrère | 7–6(7–5), 7–5 |
| 2025 (2) | Rio Noguchi |  Cui Jie | 7–6(11–9), 6–2 |
| 2025 (3) | Brandon Holt |  Vít Kopřiva | 6–3, 6–2 |
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