The 2023 Nonthaburi Challenger III was a professional tennis tournament played on hard courts. It was the 6th edition of the tournament which was part of the 2023 ATP Challenger Tour. It took place in Nonthaburi, Thailand from 16 to 22 January 2023.
Singles main-draw entrants Seeds Country Player Rank1 SeedJames Duckworth1571Alexander Ritschard1742Antoine Escoffier1923Evan Furness2114Paul Jubb2185Nicholas David Ionel2296Peter Gojowczyk2327Zdeněk Kolář2378 1 Rankings are as of 9 January 2023.
Other entrants The following players received wildcards into the singles main draw: Yuttana Charoenphon Jirat Navasirisomboon Kasidit Samrej
The following players received entry into the singles main draw as alternates: Stefano Travaglia Beibit Zhukayev
The following players received entry from the qualifying draw: Arthur Cazaux Evgeny Donskoy Jakub Menšík Shintaro Mochizuki Dominik Palán Stuart Parker
The following player received entry as a lucky loser: Giovanni Fonio
Champions Singles
Sho Shimabukuro def. Arthur Cazaux 6–2, 7–5.
Doubles
Nam Ji-sung / Song Min-kyu def. Jan Choinski / Stuart Parker 6–4, 6–4.
References