Films like "Landline", "Mars Generation" and "Dolores" were affected by the black out and will now be rescheduled, according to The Hollywood Reporter.
"Power outage at Redstone. Mars Generation, Landline and Dolores are cancelled and we will attempt to reschedule. More information to come," Sundance informed the festivalgoers.
Redstone is a theatre that frequently hosts press-and-industry screenings for films that are up for sale.
The Park City, Utah, area was experiencing particularly windy and snowy conditions on Sunday. It's the second technical glitch to hit the festival in as many days.
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