According to Leiden International Film Festival, Damsel is included in the American Indie Competition and David Zellner will be a guest of the festival:

DAMSEL (David Zellner & Nathan Zellner)
Robert Pattinson traverses the Wild West in pursuit of his true love Penelope (Mia Wasikowska), accompanied by a mostly drunken priest and his miniature horse Butterscotch. 
A western with a twist, with actor / director David Zellner as guest on the LIFF!

The Festival runs from 2 to 11 November 2018 and ticket information can be found HERE.  I will update with date as soon as it’s published.  In the meantime, enjoy the trailer uploaded by LIFF

UPDATED: 25 October 2018

Screenings at Leiden International Film Festival are:

• Saturday 3 November at 7.00pm;
• Sunday 4 November at 5.00pm; and
• Wednesday 7 November at 2.00pm

Ticket information at link above or you can check out the Timetable