Diminuendo is a 2018 drama film directed by Adrian Stewart and written by Sarah Goldberger and Bryn Pryor. The film had its world premiere at the Sarasota Film Festival on April 20, 2018. Diminuendo is Stewart's first feature film.

Set in the near future, the film stars Richard Hatch as a director who becomes obsessed with a lifelike robot that replicates his girlfriend who killed herself nine years earlier. The film also stars Chloe Dykstra, Leah Cairns, Walter Koenig, Gigi Edgley and James Deen.