12 players played 1 season. The first three are Klay Thompson on October 29, 2018 and on January 23, 2015, Zach LaVine on November 23, 2019 and Stephen Curry 12 times.

most 3s in one game all seasons
Interpreted as:
most 3s in one regular-season game all seasons by a player
10/29/2018Thompson11/23/2019LaVine11/7/2016Curry2/27/2016Curry3/13/2005Marshall1/7/2003Bryant5/8/2021Curry4/17/2021Curry4/14/2021Curry2/6/2021Curry2/2/2021VanVleet8/6/2020Lillard1/20/2020Lillard1/18/2020Smart11/25/2019Hield3/29/2019Curry1/13/2019Curry10/24/2018Curry2/1/2017Curry2/3/2016Curry1/28/2015Irving1/23/2015Thompson3/8/2013Williams11111111111111111111111
NAMEDATETMOPPSEAS3PMMINPTSREBASTSTLBLKTOVFGMFGAFG%3PA3P%FTMFTAFT%PF+/-
Klay ThompsonKlay Thompson10/29/2018GSWGSW@CHICHI114275240202182962.12458.322100.02+28
Zach LaVineZach LaVine11/23/2019CHICHI@CHACHA113354940204172860.71776.522100.05+15
Stephen CurryStephen Curry11/7/2016GSWGSWvsNOPNOP113364655204162661.51776.51250.02+7
Stephen CurryStephen Curry2/27/2016GSWGSW@OKCOKC112384636203142458.31675.06875.01+6
Donyell MarshallDonyell Marshall3/13/2005TORTORvsPHIPHI1122838103210132259.11963.2000+9
Kobe BryantKobe Bryant1/7/2003LALLALvsSEASEA112374533112162857.11866.711100.02+19
Stephen CurryStephen Curry5/8/2021GSWGSWvsOKCOKC111294952101142653.82152.41010100.02+31
Stephen CurryStephen Curry4/17/2021GSWGSW@BOSBOS111374773005152755.61957.96875.02-7
Stephen CurryStephen Curry4/14/2021GSWGSW@OKCOKC111294268000142070.01668.833100.03+31
Stephen CurryStephen Curry2/6/2021GSWGSW@DALDAL111375725103193161.31957.988100.03+7
Fred VanVleetFred VanVleet2/2/2021TORTOR@ORLORL111375432331172373.91478.699100.02+20
Damian LillardDamian Lillard8/6/2020PORPOR@DENDEN1114145412302132161.91861.181080.02+6
Damian LillardDamian Lillard1/20/2020PORPORvsGSWGSW1114561107102173745.92055.01616100.01+13
Marcus SmartMarcus Smart1/18/2020BOSBOSvsPHXPHX111333758401132552.02250.0004-11
Buddy HieldBuddy Hield11/25/2019SACSAC@BOSBOS111424152014152657.72152.4010.00+2
Stephen CurryStephen Curry3/29/2019GSWGSW@MINMIN111423735202132552.01957.9002+6
Stephen CurryStephen Curry1/13/2019GSWGSW@DALDAL111374865120173253.11957.933100.05+9
Stephen CurryStephen Curry10/24/2018GSWGSWvsWASWAS111325143012152462.51668.81010100.01+19
Stephen CurryStephen Curry2/1/2017GSWGSWvsCHACHA111303958301142070.01573.3002+25
Stephen CurryStephen Curry2/3/2016GSWGSW@WASWAS111365172307192867.91573.32366.73+20
Kyrie IrvingKyrie Irving1/28/2015CLECLEvsPORPOR111395545203173647.21957.91010100.00+12
Klay ThompsonKlay Thompson1/23/2015GSWGSWvsSACSAC111335225424162564.01573.391090.03+38
Deron WilliamsDeron Williams3/8/2013BKNBKNvsWASWAS111384235103152462.51668.811100.02+17
Stephen CurryStephen Curry2/27/2013GSWGSW@NYKNYK111485467304182864.31384.677100.03-4
JR SmithJR Smith4/13/2009DENDENvsSACSAC111304541100132259.11861.188100.00+23
StatMuse has game-level data for three-pointers going back to the 1979-80 season.