# 2022 Nonthaburi Challenger III – Singles

Arthur Cazaux was the defending champion but retired from his match with Stuart Parker in the final; 6–4, 4–1.

## Seeds

* Yosuke Watanuki (quarterfinals)
* Valentin Vacherot (first round)
* Lý Hoàng Nam (quarterfinals)
* Billy Harris (quarterfinals)
* Nicola Kuhn (first round)
* Alibek Kachmazov (first round)
* Dane Sweeny (first round)
* Prajnesh Gunneswaran (second round)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| | Sho Shimabukuro | 6$^5$ | 4 | | | | |
| Q | Stuart Parker | 7$^7$ | 6 | | | | |
| Q | Stuart Parker | 7$^7$ | 6 | Q | Stuart Parker | 6 | 4 |
| | | | | | Arthur Cazaux | 4 | 1$^r$ |
| | Arthur Cazaux | 6 | 3 | | Arthur Cazaux | 4 | 1$^r$ |
| | Omar Jasika | 0 | 0$^r$ | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | Yo Watanuki | 7 | 6$^2$ | 5 | | | | | | | | | | | | | |
| | Y-s Chung | 5 | 7$^7$ | 3$^r$ | 1 | Yo Watanuki | 6 | 6 | | | | | | | | | |
| | B Zhukayev | 7$^7$ | 7$^7$ | | | B Zhukayev | 3 | 3 | | | | | | | | | |
| | E Donskoy | 6$^4$ | 6$^4$ | | | | | | | 1 | Yo Watanuki | 6$^7$ | 0 | | | | |
| | S Shimabukuro | 6 | 6 | | | | | | | | S Shimabukuro | 7$^9$ | 6 | | | | |
| | C Broom | 3 | 2 | | | S Shimabukuro | 2 | 6 | 6 | | | | | | | | |
| Q | Y Shimizu | 6 | 6 | | Q | Y Shimizu | 6 | 3 | 4 | | | | | | | | |
| 5 | N Kuhn | 1 | 2 | | | | | | | | | | | | S Shimabukuro | 6$^5$ | 4 |
| 4 | B Harris | 6 | 7$^7$ | | | | | | | | | | | Q | S Parker | 7$^7$ | 6 |
| | B Lock | 3 | 6$^4$ | | 4 | B Harris | 2 | 6 | 6 | | | | | | | | |
| Q | Gage Brymer | 2 | 6 | 6 | Q | G Brymer | 6 | 1 | 2 | | | | | | | | |
| Alt | J McCabe | 6 | 3 | 4 | | | | | | 4 | B Harris | 4 | 4 | | | | |
| | Y Bu | 4 | 5 | | | | | | | Q | S Parker | 6 | 6 | | | | |
| Q | S Parker | 6 | 7 | | Q | S Parker | 4 | 6 | 6 | | | | | | | | |
| | Y Oliel | 6 | 3 | 6 | | Y Oliel | 6 | 3 | 4 | | | | | | | | |
| 6 | A Kachmazov | 4 | 6 | 2 | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals |
| 8 | P Gunneswaran | 6 | 6 | | | | | | | | | | | | | | |
| WC | Y Charoenphon | 1 | 2 | | 8 | P Gunneswaran | 6$^2$ | 1 | | | | | | | | | |
| WC | P Isaro | 5 | 1 | | | A Cazaux | 7$^7$ | 6 | | | | | | | | | |
| | A Cazaux | 7 | 6 | | | | | | | | A Cazaux | 6 | 3 | 6 | | | |
| | B Patael | 7$^7$ | 4 | 3 | | | | | | 3 | NH Lý | 3 | 6 | 0 | | | |
| | F Gaio | 6$^5$ | 6 | 6 | | F Gaio | 4 | 6 | 3 | | | | | | | | |
| WC | Pol Wattanakul | 5 | 2 | | 3 | NH Lý | 6 | 4 | 6 | | | | | | | | |
| 3 | NH Lý | 7 | 6 | | | | | | | | | | | | A Cazaux | 6 | 3 |
| 7 | D Sweeny | 2 | 3 | | | | | | | | | | | | O Jasika | 0 | 0$^r$ |
| | D Istomin | 6 | 6 | | | D Istomin | 4 | 3 | | | | | | | | | |
| Q | A Rai | 2 | 7 | 6$^6$ | | O Jasika | 6 | 6 | | | | | | | | | |
| | O Jasika | 6 | 5 | 7$^8$ | | | | | | | O Jasika | 6 | 6 | | | | |
| Q | K Samrej | 5 | 6 | 3 | | | | | | Q | M Ochi | 1 | 1 | | | | |
| Q | Makoto Ochi | 7 | 3 | 6 | Q | M Ochi | 6 | 1 | | | | | | | | | |
| | A Santillan | 7 | 1 | 6 | | A Santillan | 2 | 0$^r$ | | | | | | | | | |
| 2 | V Vacherot | 5 | 6 | 4 | | | | | | | | | | | | | |