NBC has cancelled Trial & Error after two seasons. Per Deadline, the anthology comedy wont be back for Season 3:
I have learned that NBC’s option to renew Trial & Error for a third season has lapsed, reverting the rights to the crime comedy back to producing studio Warner Bros TV. I hear the options on the series’ regular cast have not expired yet, and WBTV will be using the window to shop the show elsewhere.
Per sources, the odds of Trial & Error finding a new home for Season 3 are slim to none.