|Date of birth||22 January 2004|
|Place of birth||Belgrade, Serbia and Montenegro|
|Height||1.92 m (6 ft 4 in)|
|Red Star Belgrade|
|2020–2022||Red Star Belgrade||15||(1)|
*Club domestic league appearances and goals, correct as of 13 December 2021|
‡ National team caps and goals, correct as of 19 June 2022
On 29 November 2020, at the age of 16 years and 10 months, Lazetić made his debut for Red Star Belgrade as an 76th-minute substitute for Richmond Boakye against Rad. The home match finished as a 3–0 win for Red Star.
On 27 January 2022, five days after his 18th birthday, Lazetić joined Serie A club AC Milan for a fee believed to be in the region of €4 million, signing a deal until June 2026. He was assigned shirt number 22 and enlisted as a first team player. He debuted for the first team on 19 April, in a match against cross-city rivals Inter, coming on as a substitute in the 86th minute. On 22 May 2022, as Milan won the scudetto on the last matchday of the Serie A season, Lazetić was awarded a winner's medal despite making no league appearances.
- As of match played 8 November 2022.
|Red Star Belgrade||2020–21||Serbian SuperLiga||1||0||0||0||0||0||0||0||1||0|
|Grafičar Beograd (loan)||2020–21||Serbian First League||14||4||0||0||—||0||0||14||4|
|AC Milan||2021–22||Serie A||0||0||1||0||0||0||0||0||1||0|
Red Star Belgrade
- "Marko Lazetić: Biography". A.C. Milan. Retrieved 30 August 2022.
- "Лазетић: За ово тренирам од када знам за себе". crvenazvezdafk.com (in Serbian). 29 November 2020. Retrieved 30 November 2020.
- "Crvena zvezda 3–0 Rad". superliga.rs (in Serbian). 29 November 2020. Retrieved 30 November 2020.
- "OFFICIAL STATEMENT: Marko Lazetić". www.acmilan.com/en. 27 January 2022.
- "Marko Lazetić".
- "Inter-Milan, esordio in prima squadra per Marko Lazetic | News". Pianeta Milan (in Italian). Retrieved 19 April 2022.
- Marko Lazetić at Soccerway