Paranormal Activity 3 is a 2011 American found footage supernatural horror film, directed by Henry Joost and Ariel Schulman. It is the third (chronologically, the first) installment of the Paranormal Activity series and serves as a prequel, mostly set 18 years prior to the events of the first two films. It was released in theaters on October 21, 2011. Paranormal Activity 3 was also Joost and Schulman's first horror film.
The film broke financial records upon release, setting a new record for a midnight opening for a horror film ($8 million) and the best opening day for a horror film in the United States ($26.2 million).