He played college basketball for the Boise State Broncos and is their second all-time leading scorer.
[2][3] He attended the Australian Institute of Sport (AIS) in Canberra and played for the program's SEABL team in 2009 and 2010.
[6] As a sophomore in 2012–13, Drmic raised his scoring to 17.7 points per game, leading the Broncos to the 2013 NCAA tournament in the process.
As a junior in 2013–14, he was named second-team All-MWC for the second year in a row, as well as All-District by the United States Basketball Writers Association.
He became the fourth 36ers player to win the award, joining Mike McKay (1985), Chris Blakemore (1993) and Aaron Bruce (2009).
[14] On 18 December 2017, Drmic was ruled out for three weeks after suffering a medial collateral ligament sprain in his left knee three days earlier playing against the New Zealand Breakers.
[18] In May 2019, Drmic underwent surgery to relieve him of plantar fascia pain in both his feet, thus ending his 2019 Premier League season with the Southern Tigers.
[25] Drmic competed for Australia at the 2011 FIBA Under-19 World Championship, where he averaged 15.4 points per game in the nine matches and helped the Emus to a sixth-place finish.