Singles
2023 Nonthaburi Challenger
Final
Champion	Dennis Novak
Runner-up	Wu Tung-lin
Score	6–4, 6–4
Events
Singles Doubles
← 2022 · Nonthaburi Challenger · 2023 →

Stuart Parker was the defending champion^[1] but lost in the qualifying competition to Giovanni Fonio.

Dennis Novak won the title after defeating Wu Tung-lin 6–4, 6–4 in the final.

	Semifinals							Final
		Lloyd Harris	4	5
	3	Wu Tung-lin	6	7
								3	Wu Tung-lin	4	4
								2	Dennis Novak	6	6
	4	Antoine Escoffier	3	2
	2	Dennis Novak	6	6

	First round							Second round							Quarterfinals							Semifinals
	1	F Marozsán	6	6
	WC	P Kovapitukted	3	3				1	F Marozsán	6	0	3
		B Hassan	2	5					L Harris	3	6	6
		L Harris	6	7												L Harris	67	6	6
		M Trungelliti	5	2											8	Y-h Hsu	79	3	4
	Q	D Kelly	7	6				Q	D Kelly	2	2
		H Moriya	3	2				8	Y-h Hsu	6	6
	8	Y-h Hsu	6	6																			L Harris	4	5
	3	T-l Wu	6	6																		3	T-l Wu	6	7
	WC	T Suksumrarn	4	1				3	T-l Wu	64	7	6
		Y Uchiyama	6	6					Y Uchiyama	77	5	4
	WC	Maximus Jones	4	4											3	T-l Wu	7	3	6
		V Royer	4	6	2										Q	E Donskoy	5	6	3
	Q	Alafia Ayeni	6	3	6			Q	A Ayeni	4	4
	Q	E Donskoy	6	77				Q	E Donskoy	6	6
	6	P Jubb	1	65

	First round							Second round							Quarterfinals							Semifinals
	7	M Purcell	6	6
		S Travaglia	2	4				7	M Purcell	77	6
		M Moraing	7	65	6				M Moraing	65	4
	Q	L Pouille	5	77	3										7	M Purcell	2	68
		S Shimabukuro	6	3	6										4	A Escoffier	6	710
		B Zhukayev	4	6	4				S Shimabukuro	6	66	3
		S Mochizuki	4	77	2			4	A Escoffier	2	78	6
	4	A Escoffier	6	65	6																	4	A Escoffier	3	2
	5	G Mager	3	78	3																	2	D Novak	6	6
	Q	H Squire	6	66	6			Q	H Squire	4	3
		M Gengel	6	64	6				M Gengel	6	6
		T Sandgren	4	77	1											M Gengel	3	77	3
	Q	G Fonio	5	77	79										2	D Novak	6	65	6
		TA Tirante	7	63	67			Q	G Fonio	2	1
		D Added	2	2				2	D Novak	6	6
	2	D Novak	6	6

• Main draw
• Qualifying draw