Season three of Seinfeld, an American television series created by Jerry Seinfeld and Larry David, began airing on September 18, 1991 on NBC, a U.S. broadcast television network. It comprises 23 episodes and concluded its initial airing on May 6, 1992. "The Tape", "The Pen", and "The Letter" are some of the season's episodes that were inspired by the writers' own experiences. Co-creator Larry David admits that season three was a big turning point for the series in terms of how the show was made; it's where the writers started doing non linear storylines with episodes containing multiple stories. George was becoming a bigger liar, Elaine was becoming more quirky, and Kramer was becoming surer of himself throughout his crazy antics. This season received eight Emmy nominations and one Directors Guild of America Award.

Season two of Seinfeld, an American television series created by Jerry Seinfeld and Larry David, began airing on January 23, 1991, on NBC.