Freeform's adaptation of Cassandra Clare's The Mortal Instruments won't be coming back for a fourth season. The second part of the third season of Shadowhunters will debut early next year bringing the series to an end, but there is a silver lining. Freeform has increased their ten-episode order to twelve with the bonus two instalments serving as a feature-length finale.

According to Deadline, the decision to the cancel the show had nothing to do with the creative direction and was "purely economic".  In a statement from Freeform, the network promised to "give devoted fans a proper ending".

“We are very proud of Shadowhunters, a series that broke new ground in the genre world and became a fan favourite. However, along with our partners at Constantin, we reached the very difficult decision not to renew the show for a fourth season.  But as big supporters and fans ourselves, Freeform insisted on and championed the filming of a special two-part finale that would give devoted fans a proper ending.  The twelve episodes will air in spring of 2019.  We want to thank our talented creators, producers, cast and crew along with our colleagues at Constantin for their hard work and dedication and to Cassie Clare for her incredible book series. We look forward to the final chapter of this breakthrough drama.”

The two-hour finale will use the last two books as its source of inspiration. While fans might feel shortchanged that the final two books won't get the same full treatment as the others, at least all of books get used in some capacity. Fifty-five episodes is a darn sight better than the one movie that tried a failed to launch a franchise back in 2013.

Shadowhunters will return for its final batch of episodes early next year.