"Li'l Sebastian" is the sixteenth episode and season finale of the third season of the American comedy television series Parks and Recreation, and the 46th overall episode of the series. It originally aired on NBC in the United States on May 19, 2011. In the episode, as the parks department prepares a funeral for Pawnee's famous miniature horse Li'l Sebastian, Leslie and Ben struggle to keep their workplace romance a secret. The episode was written by Daniel J. Goor and directed by Dean Holland.

The third season of Parks and Recreation originally aired in the United States on the NBC television network between January 20 and May 19, 2011. Like the previous seasons, it focuses on Leslie Knope and her staff at the parks and recreation department of the fictional Indiana town of Pawnee. The season featured 16 episodes, most of which were approximately 22 minutes long each and aired at 9:30 p.m. on Thursdays. The season stars Amy Poehler, Rashida Jones, Aziz Ansari, Nick Offerman, Aubrey Plaza, Chris Pratt, Adam Scott, and Rob Lowe, with supporting performances from Jim O'Heir and Retta.