Born in Titova Mitrovica, Lazetić started out at his hometown club Trepča. He was later discovered by Tomislav Milićević who brought him to Red Star Belgrade. In December 1995, Lazetić made his league debut for the club in a 5–1 home win over Proleter Zrenjanin. He made three more appearances in the second half of the 1995–96 season. In the summer of 1996, Lazetić was loaned to Budućnost Valjevo, before returning to Red Star in the second part of the 1996–97 season. He also played on dual registration at Hajduk Beograd during the spring. In the summer of 1998, Lazetić signed with Vojvodina, helping them reach the 1998 UEFA Intertoto Cup final. He subsequently moved to Obilić in a controversial transfer during the winter of 1999, spending the next year and a half at the club. In May 2000, Lazetić was sold to Turkish club Fenerbahçe. He helped them win the league in his debut season, contributing with five goals in 30 appearances. In his second year, Lazetić appeared in 16 league games and scored once, as the team finished runners-up to Galatasaray. In June 2002, Lazetić moved to Italy and joined Serie A newcomers Como. He was loaned to Chievo three months later, without making his debut for Como. In January 2003, Lazetić's rights were transferred to Lazio until the end of the season. In July 2003, Lazetić joined fellow Serie A club Siena on a season-long loan from Como. He was subsequently sold to Serie B side Genoa, but remained on loan at Siena. In August 2005, Lazetić signed a two-year contact with Serie A club Livorno. He later moved to Serie B side Torino in January 2006, helping them win promotion to the top flight. Afterwards, Lazetić spent two more seasons at the club. In August 2008, Lazetić returned to Serbia and joined his parent club Red Star Belgrade, signing a two-year contract. He captained the side that won the 2009–10 Serbian Cup. In June 2010, Lazetić left the club after failing to agree to a contract extension. In August 2010, Lazetić signed a one-year deal with his former club Vojvodina. He was released at the end of his contract.
International career
Lazetić was capped 25 times and scored once for Serbia and Montenegro between 1998 and 2003.
