Downton Abbey 3 is an upcoming historical drama film directed by Simon Curtis from a screenplay by Julian Fellowes. It is the sequel to Downton Abbey: A New Era (2022) and the third film in the Downton Abbey franchise. Much of the original franchise's cast, which also appeared in the previous two films, will return, with Paul Giamatti and Dominic West reprising their roles as Harold Levinson from the television series and Guy Dexter from the second film, respectively, and Joely Richardson, Alessandro Nivola, Simon Russell Beale and Arty Froushan joining the cast.

The film is scheduled to be released by Focus Features on 12 September 2025.