# 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)

## 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 |
| 7 | Matteo Gigante | 6 | 7 | | | | |
| Alt | Jason Jung | 3 | 5 | | | | |
| Alt | Jason Jung | 3 | 5 | 7 | Matteo Gigante | 6 | 6 |
| | | | | Q | Hong Seong-chan | 4 | 1 |
| Q | Giovanni Fonio | 4 | 1 | Q | Hong Seong-chan | 4 | 1 |
| Q | Hong Seong-chan | 6 | 6 | | | | |

### 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | D Ajduković | 7 | 4 | 6 | | | | | | | | | | | | | | |
| | S Travaglia | 5 | 6 | 4 | 1 | D Ajduković | 6$^6$ | 6 | 6 | | | | | | | | | |
| WC | Thanapet Chanta | 7$^7$ | 4 | | WC | T Chanta | 7$^8$ | 4 | 0 | | | | | | | | | |
| Q | A Santillan | 6$^4$ | 1$^r$ | | | | | | | 1 | D Ajduković | 6 | 3 | 2 | | | | |
| | G Onclin | 6 | 6 | | | | | | | 7 | M Gigante | 3 | 6 | 6 | | | | |
| Alt | C Tabur | 4 | 3 | | | G Onclin | 2 | 7$^9$ | 2 | | | | | | | | | |
| Q | A Weber | 6 | 1 | 2 | 7 | M Gigante | 6 | 6$^7$ | 6 | | | | | | | | | |
| 7 | M Gigante | 1 | 6 | 6 | | | | | | | | | | | 7 | M Gigante | 6 | 7 |
| 4 | G Brouwer | 3 | 1 | | | | | | | | | | | | Alt | J Jung | 3 | 5 |
| | R Peniston | 6 | 6 | | | R Peniston | 6 | 7$^7$ | | | | | | | | | | |
| | T-l Wu | 5 | 7 | 6 | | T-l Wu | 3 | 6$^5$ | | | | | | | | | | |
| | M Lajal | 7 | 5 | 3 | | | | | | | R Peniston | 4 | 3 | | | | | |
| WC | Maximus Jones | 2 | 1 | | | | | | | Alt | J Jung | 6 | 6 | | | | | |
| Alt | J Jung | 6 | 6 | | Alt | J Jung | 6 | 7$^7$ | | | | | | | | | | |
| | A Dougaz | 4 | | | | A Dougaz | 4 | 6$^4$ | | | | | | | | | | |
| 6 | V Sachko | 1$^r$ | | | | | | | | | | | | | | | | |

### 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 | Semifinals | Semifinals | Semifinals | Semifinals |
| LL | N Moreno de Alboran | 6 | 7$^7$ | | | | | | | | | | | | | | |
| | F Passaro | 3 | 6$^4$ | | LL | N Moreno de Alboran | 6$^{10}$ | 7 | 7$^7$ | | | | | | | | |
| | Y-h Hsu | 4 | 5 | | Q | T Sandgren | 7$^{12}$ | 5 | 6$^2$ | | | | | | | | |
| Q | T Sandgren | 6 | 7 | | | | | | | LL | N Moreno de Alboran | 4 | 4 | | | | |
| | Jules Marie | 2 | 1$^r$ | | | | | | | Q | G Fonio | 6 | 6 | | | | |
| Q | G Fonio | 6 | 4 | | Q | G Fonio | 6 | 6$^5$ | 7 | | | | | | | | |
| Q | Y Bai | 1 | 3 | | 3 | S Shimabukuro | 0 | 7$^7$ | 5 | | | | | | | | |
| 3 | S Shimabukuro | 6 | 6 | | | | | | | | | | | Q | G Fonio | 4 | 1 |
| 8 | M Bellucci | 4 | 2 | | | | | | | | | | | Q | S-c Hong | 6 | 6 |
| | G Oliveira | 6 | 6 | | | G Oliveira | 4 | 4 | | | | | | | | | |
| | D Novak | 6 | 6 | | | D Novak | 6 | 6 | | | | | | | | | |
| WC | K Samrej | 1 | 3 | | | | | | | | D Novak | 2 | 0$^r$ | | | | |
| Q | S-c Hong | 3 | 7$^7$ | 6 | | | | | | Q | S-c Hong | 6 | 0 | | | | |
| | O Roca Batalla | 6 | 6$^5$ | 3 | Q | S-c Hong | 6 | 6 | | | | | | | | | |
| | B Harris | 6$^3$ | 1 | | 2 | B Hassan | 2 | 3 | | | | | | | | | |
| 2 | B Hassan | 7$^7$ | 6 | | | | | | | | | | | | | | |