Finally! MTV has announced the premiere of Teen Wolf: June 3rd. The third season will air Monday nights at 10pm, and the 24-episode season will be split in half. While no other details have been confirmed, I am guessing they will air the first 12 episodes starting in June, and air the second half at the beginning of 2014.
The third season picks up four months after season two, and without Colton Haynes (who played Jackson). The new threat in season three is a pack of alpha wolves who are "intent on bringing Derek into their fold."