у нас не осталось

we have no … left

→ у
phrase Rare #53,639
we have no … left Used to say that nothing remains for us. The missing item is usually expressed in the genitive case.
RU: У нас не осталось хлеба.
EN: We have no bread left.

Хотя, боюсь, времени у нас не осталось.

Although, I'm afraid we don't have any time left.

— Ходячий замок (2004)

У нас не осталось воды.

We have no water left.