Stadium: Court Centre Round: 54 Ground: Hardcourt outdoor
| ITF M15 Chiang Rai | 2022/04/18 02:00 | Natthasith Kunsuwan v Thantub Suksumrarn | 7-5,3-6,9-11 |
| ITF M15 Hua Hin | 2023/11/09 03:00 | Goncalo Oliveira v Thantub Suksumrarn | 6-2,6-4 |
| ITF M15 Hua Hin | 2023/11/08 03:00 | Thantub Suksumrarn v Pengyu Lu | 6-2,6-2 |
| ITF M15 Nakhon Si Thammarat | 2023/09/07 02:00 | Mitsuki Wei Kang Leong v Thantub Suksumrarn | 2-6,7-6,7-5 |
| ITF M15 Nakhon Si Thammarat | 2023/09/06 05:50 | Thantub Suksumrarn v Gage Brymer | 6-4,6-3 |
| ITF M15 Nakhon Si Thammarat | 2023/09/04 03:10 | Thantub Suksumrarn v Cade Birrell | 6-4,6-3 |
| ITF M15 Nakhon Si Thammarat | 2023/08/31 04:35 | Thantub Suksumrarn v Maximus Jones | 4-6,3-6 |
| ITF M15 Nakhon Si Thammarat | 2023/08/30 08:30 | Taiyo Yamanaka v Thantub Suksumrarn | 2-6,3-6 |
| ITF M15 Nakhon Si Thammarat | 2023/08/28 01:50 | James Watt v Thantub Suksumrarn | 4-6,2-6 |
| ITF M15 Hua Hin | 2023/11/09 03:00 | Natthasith Kunsuwan v Bang Shuo Yin | 7-6,0-6,3-6 |
| ITF M15 Hua Hin | 2023/11/07 03:00 | Yunseok Jang v Natthasith Kunsuwan | 4-6,4-6 |
| ITF M15 Hua Hin | 2023/11/06 05:35 | Zongbing Yu v Natthasith Kunsuwan | 4-6,4-6 |
| ITF M15 Hua Hin | 2023/11/05 06:35 | Alexey Shtengelov v Natthasith Kunsuwan | 6-2,1-6,3-10 |
| ITF M15 Nakhon Si Thammarat | 2023/09/06 03:50 | Sidharth Rawat v Natthasith Kunsuwan | 6-2,6-0 |
| ITF M15 Nakhon Si Thammarat Qual | 2023/09/04 02:00 | Faisal Qamar v Natthasith Kunsuwan | 4-6,2-6 |
| ITF M15 Nakhon Si Thammarat Qual | 2023/09/03 03:15 | Sammr Raina v Natthasith Kunsuwan | 6-7,6-4,7-10 |
| ITF M15 Nakhon Si Thammarat | 2023/08/30 02:00 | Natthasith Kunsuwan v Siddhant Banthia | 4-6,6-2,2-6 |