BB3

BB3 may refer to:


 * BB3, a postcode district the BB postcode area
 * Bombesin-like receptor 3, also known as BB3
 * Big Brother 3 (disambiguation), a television programme in various versions
 * BB3 (film), a 2021 Indian Telugu-language film directed by Boyapati Srinu, starring Balakrishna; the title being from their names Balakrishna-Boyapati (BB)