3's a Crowd was a folk rock band from Vancouver that existed from 1964 to 1969, spending most of that time in Toronto and Los Angeles. The group had some moderate Canadian chart success, but is particularly notable for the wide range of Canadian musicians who passed through its ranks and would later establish successful careers of their own, including Bruce Cockburn, Colleen Peterson, David Wiffen, Trevor Veitch, and Brent Titcomb. 3's A Crowd is also remembered for its association with Cass Elliott, who co-produced the group's sole album release.