Singles
2023 Nonthaburi Challenger III
Champion	Sho Shimabukuro
Runner-up	Arthur Cazaux
Score	6–2, 7–5

Arthur Cazaux was the defending champion^[1] but lost in the final to Sho Shimabukuro.

Shimabukuro won the title after defeating Cazaux 6–2, 7–5 in the final.

Seeds

Draw

Finals

	Semifinals							Final
		Sho Shimabukuro	6	7
		Hong Seong-chan	2	5
									Sho Shimabukuro	6	7
								Q	Arthur Cazaux	2	5
	LL	Giovanni Fonio	5	3
	Q	Arthur Cazaux	7	6

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	J Duckworth	6	6
	Alt	B Zhukayev	3	4				1	J Duckworth	64	6	1
		S Shimabukuro	6	6					S Shimabukuro	77	4	6
		M Moraing	3	2												S Shimabukuro	6	67	6
		J Choinski	6	6											8	Z Kolář	0	79	2
	WC	J Navasirisomboon	1	3					J Choinski	4	6	0
	Q	E Donskoy	6	67	2			8	Z Kolář	6	3	6
	8	Z Kolář	3	79	6																		S Shimabukuro	6	7
	4	E Furness	1	1																			S-c Hong	2	5
		K Żuk	6	6					K Żuk	3	4
	WC	Y Charoenphon	3	1					M Geerts	6	6
		M Geerts	6	6												M Geerts	1	5
		S-c Hong	6	6												S-c Hong	6	7
	WC	K Samrej	4	4					S-c Hong	6	77
		NH Lý	6	77					NH Lý	2	63
	6	ND Ionel	1	65

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	LL	G Fonio	6	7
		D Yevseyev	2	5				LL	G Fonio	64	6	6
		H Moriya	0	4					B Hassan	77	4	2
		B Hassan	6	6											LL	G Fonio	7	65	2
		D Michalski	6	6											3	A Escoffier	5	77	1r
	Q	Dominik Palán	4	2					D Michalski	3	6	1
	Alt	S Travaglia	1	64				3	A Escoffier	6	4	6
	3	A Escoffier	6	77																		LL	G Fonio	5	3
	5	P Jubb	6	4	5																	Q	A Cazaux	7	6
	Q	S Mochizuki	2	6	7			Q	S Mochizuki	3	1
		D Added	6	4	1				T Sandgren	6	6
		T Sandgren	1	6	6											T Sandgren	64	4
	Q	A Cazaux	77	6											Q	A Cazaux	77	6
	Q	S Parker	61	4				Q	A Cazaux	6	6
	Q	J Menšík	77	7				Q	J Menšík	3	0
	2	A Ritschard	65	5

References

External links

• Main draw
• Qualifying draw