At the time of Bitty Schram's departure, a USA Network spokesperson released a statement noting that "Monk" had decided to move in a new creative direction. This change in course would include Schram's exit from the series.
The statement continued, "We thank her for her notable contributions and wish her the very best" (via Today). Schram's management firm, Untitled Entertainment, gave a similar statement, emphasizing that the situation was amicable and that Shcram wished the best for the rest of the cast and crew. While neither of these statements specifically address it, there are reports that the exit was due to a contract dispute, as reported by Entertainment Weekly.
Luckily, Schram and USA Network were able to reach an agreement for her to return for a single episode of the final season, titled "Mr. Monk and Sharona." In the episode, we learn that Sharona has separated from Trevor for good and is managing a veterans hospital. Further, Sharona is happy to report that her son is all grown up and looking at colleges. She is back in San Francisco to arrange the funeral for an uncle who has just died (which leads to Monk looking into the death when he suspects foul play).
Addressing Schram's return, "Monk" star Tony Shalhoub told Entertainment Weekly, "We couldn't think of a better way to help wrap up the series than with the return of Bitty's character. Bringing some closure to Sharona is long overdue."
