Let 3 is a modern rock band from Rijeka, Croatia that was formed in 1987. Its frontmen are Damir "Mrle" Martinović and Zoran "Prlja" Prodanović. The band is well-known in the former Yugoslavia for its unique approach to rock music and controversial live performances. Let 3 has gained a reputation for its provocative and vulgar lyrics. The band champions liberal causes such as women's and LGBTQ+ rights and opposes conservative politics and the Catholic Church.

Let 3 gained notoriety for their album Nečuveno, which had nothing recorded on it, but still sold 350 copies. They followed up with Jedina, of which the band initially refused to sell or distribute, leading to a staged (fake) suicide by firing squad in Zagreb. In 2000, Let 3 displayed a four-meter tall statue titled Babin kurac (Grandma's penis) in various cities throughout Croatia. The band's single "Rado ide Srbin u vojnike (Pička)" parodied Balkan machismo and militarism and featured extras in Serbian and Albanian national costumes masturbating. In 2006, the band was sanctioned by the police for performing naked at an open-air concert in Varaždin.

Let 3 was selected to represent Croatia in the Eurovision Song Contest 2023 with their song "Mama ŠČ!" The band was joined by artist Žanil Tataj Žak as the character "Njinle" for their performance, and they won the competition with 279 points. Let 3's current members include Damir Martinović, Zoran Prodanović, Ivan Bojčić, Dražen Baljak, and Matej Zec.