не успеют

won't have time

→ не
phrase Rare #49,503
won't have time Used with a plural subject for something that won't be completed in time.
RU: Они не успеют закончить работу до вечера.
EN: They won't have time to finish the work by evening.

Но, боюсь, они не успеют.

But I'm afraid they won't make it in time.

— War (2002)

Иначе они не успеют подготовиться.

Otherwise, they won’t have time to prepare.

— Салют-7 (2017)

Боишься, что не успеют продать?

Are you afraid they won't manage to sell it in time?

— Посредник (2022)

Беженцы не успеют укрыться до заката!

The refugees won’t make it to shelter before sunset!

— Битва у Красной скалы (2008)