Third year is not much better than the others.
On the train Sasha sits in the first compartment that has room for him and isn't full of Ravenclaws, and speaks very little. He understands enough of their conversation to follow it, but not enough to participate and not look stupid.
The feast is the same as ever. A boy whose name everyone but Sasha seems to know is sorted into Gryffindor. He sits at the end of the table, doesn't speak and isn't spoken to. They get their schedules — Transfiguration, History of Magic, Charms with the Gryffindors, Herbology and Potions with the Hufflepuffs, Muggle Studies and Arithmancy with everyone who's taking the class.
(It would have been nice to drop Potions. No such luck for Sasha.)
His first class on Monday is Charms. Flitwick tries but it's never quite enough; he speaks too quickly and doesn't come around to help until Sasha has already publicly failed to make anything happen.