Born in
Belgrade, Sajčić passed
Partizan youth school, and later spent 2 seasons with
Teleoptik. He scored 18 goals for the 2014–15 season including 4 in a match against
Hajduk Beograd and was the best scorer of
Serbian League Belgrade. After a half-season with
Sinđelić Beograd, Sajčić joined
Jagodina for the spring half of
2015–16 season. Later, same year, Sajčić moved in
Borac Čačak. In April 2024, he joined
Malaysia Super League club
Kuala Lumpur City but left in August 2024 without making a single appearance. On 27 February 2025 announced that Lazar Sajčić signed with lithiaunian
Riteriai Club. On 1 March 2025 he played debut match in
A Lyga against
Sūduva ==References==