The third season of the American mystery comedy-drama television series Only Murders in the Building premiered on August 8, 2023, on Hulu.

Paul Rudd and Meryl Streep star in a special guest capacity in the season, and are credited with the main cast in the episodes they appear in.

[5] In March 2023, Jeremy Shamos, Linda Emond, Wesley Taylor, Don Darryl Rivera, Allison Guinn, and Gerald Caesar were cast in recurring capacities for the season.

[8] The episodes in the season were written by John Hoffman, Sas Goldberg, Ben Smith, Joshua Allen Griffith, Matteo Borghese, Rob Turbovsky, J. J. Philbin, Tess Morris, Noah Levine, Madeleine George, Ben Philippe, Jake Schnesel, Pete Swanson, Siena Streiber and Elaine Ko.

The website's critics consensus reads, "Relocating the action to the theatre, Only Murders in the Building can take a bow for yet another twisty mystery handled with a good-humored touch.

", which was featured in the eighth episode of the third season, won the Primetime Emmy Award for Outstanding Original Music and Lyrics.