| ITF M15 Monastir | 10/04 13:00 | 62 | Thanapet Chanta v Natthasith Kunsuwan | 6-2,6-4 | |
| ITF M15 Monastir | 10/04 09:00 | 62 | Aaditya Tewari v Natthasith Kunsuwan | 0-6,2-6 | |
| ITF M15 Monastir | 09/27 08:00 | 62 | Geni Inoue v Natthasith Kunsuwan | 6-2,6-0 | |
| ITF M15 Monastir | 09/22 10:20 | 25 | Giorgio Ricca v Natthasith Kunsuwan | Retired | |
| ITF M15 Monastir | 09/21 08:00 | 62 | Daisuke Sumizawa v Natthasith Kunsuwan | 6-2,3-6,7-10 | |
| ITF M15 Monastir | 09/14 08:00 | 62 | Paras Dahiya v Natthasith Kunsuwan | 7-5,6-2 | |
| ITF M15 Monastir | 09/13 08:00 | 62 | Andres Haefele v Natthasith Kunsuwan | 1-6,4-6 | |
| ITF M15 Doha | 03/11 13:55 | 25 | Daniil Glinka v Natthasith Kunsuwan | 6-4,5-7,6-4 | |
| ITF M15 Doha | 03/10 12:00 | 54 | Natthasith Kunsuwan v Mihnea L.S. Turcu | 7-6,6-3 | |
| ITF M25 Nonthaburi | 02/03 04:15 | 44 | Cheong-Eui Kim v Natthasith Kunsuwan | 7-6,6-2 | |
| ITF M25 Nonthaburi | 02/02 02:30 | 44 | Natthayut Nithithananont v Natthasith Kunsuwan | 5-7,1-6 | |
| ITF M25 Nonthaburi | 01/26 04:05 | 44 | Natthasith Kunsuwan v Cheong-Eui Kim | 6-7,3-6 | |
| Challenger Bangkok 2 | 01/20 03:00 | 28 | Aslan Karatsev v Natthasith Kunsuwan | 6-4,6-3 | |
| ITF M15 Hong Kong | 01/06 02:00 | 54 | Wei-De Lin v Natthasith Kunsuwan | 6-1,3-6,10-6 | |
| ITF M15 Nonthaburi | 12/03 04:35 | 44 | Qun Gao v Natthasith Kunsuwan | 6-3,6-1 | |
| ITF M15 Nonthaburi | 12/02 02:30 | 44 | Sergey Shipilov v Natthasith Kunsuwan | 1-6,7-6,5-10 | |
| ITF M15 Nonthaburi Qual | 12/01 06:10 | 44 | Natthasith Kunsuwan v Rishi Reddy | 6-4,6-0 | |
| ITF M15 Nonthaburi | 11/25 03:50 | 44 | Natthasith Kunsuwan v Daisuke Sumizawa | 7-6,6-7,9-11 | |
| ITF M15 Nonthaburi | 11/24 06:45 | 44 | Natthasith Kunsuwan v Thanapet Chanta | 7-6,4-6,10-3 | |
| ITF M15 Nanchang | 10/03 05:00 | 26 | Natthasith Kunsuwan v Taisei Ichikawa | 0-6,6-7 | |
| ITF M15 Nanchang | 10/02 05:15 | 25 | Natthasith Kunsuwan v Haitong Xia | 3-6,7-6,6-2 | |
| ITF M15 Nanchang | 09/30 07:40 | 44 | Zhao Zhao v Natthasith Kunsuwan | 1-6,6-1,7-10 | |
| ITF M15 Nanchang | 09/30 02:00 | 44 | Amit Beniwal v Natthasith Kunsuwan | 3-6,1-6 | |
| ITF M15 Nanchang | 09/29 02:00 | 44 | Baoluo Zheng v Natthasith Kunsuwan | 2-6,3-6 | |
| ITF M15 Nanchang | 09/23 02:00 | 44 | Kousuke Ogura v Natthasith Kunsuwan | 6-1,6-1 | |
| ITF M15 Nanchang | 09/22 02:00 | 44 | Jing Ke Chen v Natthasith Kunsuwan | 4-6,1-6 | |
| ITF M15 Nanchang | 09/16 02:00 | 44 | Amit Beniwal v Natthasith Kunsuwan | 1-6,3-6 | |
| ITF M15 Nanchang | 09/16 02:00 | 44 | Shinnosuke Hiramatsu v Natthasith Kunsuwan | 7-5,6-3 | |
| ITF M15 Sajur | 09/03 07:00 | 45 | Natthasith Kunsuwan v Sahar Simon | 6-7,4-6 | |
| ITF M15 Sajur | 09/02 09:30 | 45 | Natthasith Kunsuwan v Guy Dagan | 6-3,6-2 |