Paranormal Activity 3 is a 2011 American found footage supernatural horror film directed by Henry Joost and Ariel Schulman.

It is the third installment of the Paranormal Activity series and serves as a prequel, mostly set 18 years prior to the events of the first two films.

Dennis notices that since Kristi's imaginary friend "Tobi" appeared, strange things have been happening around the house.

After reviewing the footage and noticing an invisible figure revealed by falling dust, Dennis is advised by his friend Randy to place cameras throughout the house.

Dennis and Julie hire a babysitter named Lisa to watch the kids, but she becomes desperate to leave due to several terrifying incidents.

When Julie and Dennis return home, he informs her that the symbol belonged to a witches' coven that brainwashed girls of child-bearing age into having sons, then forced them to give up their sons and forget everything afterward, but Julie dismisses his claim.

She asks her mother to take them to her grandmother Lois's house in Moorpark, California, and Julie agrees after encountering frightening activity herself.

He flees back to the house, with the women in pursuit, and finds Julie's limp body levitating above the ground before it is thrown at Dennis.

The website's consensus is, "While the jolts and thrills are undeniably subject to the diminishing returns that plague most horror sequels, Paranormal Activity 3 is a surprisingly spine-tingling treat.

"[15] Paranormal Activity 3 was released on DVD/Blu-ray and video on demand/pay-per-view on January 24, 2012, and includes an unrated director's cut, "lost tapes" (deleted scenes), theatrical version, and digital copy.