Protecting our Communities from Sexual Predators ActThis bill requires the Department of Justice (DOJ) to detain certain non-U.S. nationals (aliens under federal law) who have been arrested for sexual assault. The bill also provides for the inadmissibility and deportability of certain individuals convicted of sexual assault.Under this bill, the DOJ must detain an individual who (1) is unlawfully present in the United States, made certain misrepresentations, or did not possess the necessary documents when applying for admission; and (2) has been charged with, arrested for, convicted of, or admits to having committed acts which constitute the essential elements of, an offense involving sexual assault.The bill also establishes under statute that a conviction for certain crimes related to sexual assault shall be grounds for (1) barring an individual from entering the United States, and (2) deportability. (Under current law, convictions for certain crimes, including crimes involving moral turpitude, are grounds for inadmissibility and deportability.)