You ___ come on Saturday. The lesson is cancelled.

1. The Russian sentence "Вам не обязательно приходить в субботу. Урок отменён." translates to "You do not have to come on Saturday. The lesson is cancelled.".
2. The phrase "не обязательно" indicates lack of obligation.
3. The modal phrase "do not have to" expresses this lack of obligation.
Answer: do not have to