On what date was the album that featured the song "Untitled 03 | 05.28.2013." released?
Untitled 03 – 05.28.2013.: , titled "Untitled 1" before its official release, is a song by American rapper Kendrick Lamar, featured on his compilation album, "untitled unmastered. Untitled Unmastered:  It was released on March 4, 2016, by Top Dawg Entertainment, Aftermath Entertainment and Interscope Records.
March 4, 2016