In 1998, Marko Popovic began his career and was a member of KK Zadar. He was briefly involved with Southern Idaho team (of the NCAA Division II) in 2000 and later reverted to Zadar and Croatia. During the 2002-03 season, KK Zadar was victorious in the league’s championship.
Popovic joined Pamesa Valencia of the Spanish ACB League during the 2003-04 season. In the next season, he became a member of Cibona Zagreb in Croatia and with this team he won the Croatian Championship. Later in 2005, he signed a deal with Efes Pilsen, the Turkish League Club. He shifted to Zalgiris Kaunas of the Lithuanian League in 2006. When he was along with this team, he won the Lithuanian Championships in 2006-07 and 2007-08.
In 1999, Popovic was included in the roster of Croatian Men’s junior national basketball team which participated in the FIBA Europe Under-18 Championship and he was selected as the MVP. In 2002, he became a member of Croatian national basketball team (Senior Men’s). Along with this team, he participated in European Championship in 2003, 2005 and 2007 as well as the Olympic Basketball Tournament in 2008. Currently, he is a member of UNICS Kazan.
Marko Popovic was the Goodyear League’s MVP in the 2002-03 season.
Popovic won the silver medal at the 2000 FIBA Europe Under-18 Championship. He was the leading scorer in assists and scores at the FIBA Europe Under-20 Championship in 2002.