Watch Despicable Me 3 (2017) HD Full Movie Free on SolarMovie. Watch Despicable Me 3 (2017) online free. Gru meets his long-lost, charming, cheerful, and more successful twin brother Dru, who wants to team...Gru meets his long-lost, charming, cheerful, and more successful twin brother Dru, who wants to team up with him for one last criminal heist.