The film, directed by Shlok Sharma, has been selected for "A window on Asian Cinema" category at the film festival.
"Zoo" has been entirely shot on iPhone 6.
In the movie, Shweta plays the role of a young teenager by the name of Misha Mehta, who blames herself for an accident that happened a few years ago and finds herself trapped in her house to escape her emotions. She finds solace in drugs.
"I always wanted to be a part of films which matter and being rewarded by getting recognition from a festival like Busan is something I as an actor work for primarily. I always wanted to be part of experimental cinema and this film gives me exactly that," Shweta said in a statement.