- 3+2 (hungarian band)
- 30 Amp Fuse
- 30 Deep Grimeyy
- 30 Odd Foot of Grunts
- 30/70
- 3000m
- 3010
- 3030 (Brazilian band)
- 303s, The
- 30footFALL
- 30Y
- 31 Minutos
- 3108
- 311
- 313 (groupe de rap français)
- 315 STARS
- 31Knots
- 31st of February, The
- 32 Below
- 32 Leaves
- 321 (UK hip-hop)
- 32CRASH (Belgian electropunk trio)
- 33 DC
- 33 Dogs
- 33 Lovers
- 33 West
- 33, La
- 330ml
- 33Hz
- 33Miles
- 33rpm
- 34 Puñaladas
- 340ml
- 3421 (performed SXSW 2013)
- 347aidan
- 34A (Belgian hip-hop group)
- 34murphy (french rap)
- 35.7
- 357 (band from Belgrade, Serbia)
- 357 String Band, The
- 3582
- 36 (Electronic artist Dennis Huddleston)
- 36 Crazyfists
- 36 Questions
- 360 (Australian rapper)
- 360 feat. Bright Young Things, The
- 360 feat. Cheney, Chris
- 360 feat. Gossling
- 360 feat. Jeremedy
- 360 feat. Joelistics
- 360 feat. Johns, Daniel
- 360 feat. Miracle
- 360 feat. N'fa
- 360 feat. N’fa
- 360 feat. Pez
- 360 feat. Pyke, Josh
- 360 gradi
- 360’s
- 365 (Brazilian punk band)
- 365 (Vietnamese boy band)
- 37 Hostias
- 38 Special (American rock band)
- 38 Spesh (US rapper)
- 38 Spesh feat. Ransom
- 385 (Japanese band)
- 38th Parallel
- 3A (Minh Ánh, Minh Anh & Ngọc Anh)
- 3A (German Band from Kerken)
- 3AM (US Emo/Indie Folk Group)
- 3BallMTY
- 3BallMTY & Rubio, Chayín
- 3BallMTY feat. América Sierra & Bebeto, El
- 3BallMTY feat. Becky G
- 3BallMTY feat. Fuego, Morenito de
- 3BallMTY feat. Smoky
- 3BallMTY, ATL & Shaira
- 3Berlin
- 3Breezy
- 3D (Hawaiian R&B group)
- 3D & Young Fathers
- 3D Remedy
- 3D Stas (Ukrainian breakbeat and industrial producer)
- 3D Stas feat. Adams, Robin
- 3D Stas feat. Bowes, Charlie
- 3D Stas feat. Qemists, The
- 3D Stas feat. Richy Nix
- 3D Stas feat. Soul Extract
- 3Deep (CA/US boy band, key track "Into You")
- 3drac
- 3Ds (New Zealand noise pop band)
