Sasuke is missing his left hand in Boruto: Naruto the Movie. In the manga, Tsunade gives him a new hand but he gets it removed. Why?
According to my opinion, he just wanted to keep that lose to remind him of someone who is always willing to go to great lengths too save him (naruto). Also he shouldn't see the world in darkness as he used to in shippuden. While naruto accepted Tsunade-hime's help to have an arm, he was being a little emo here. After all it was the biggest event in his life.