leave someone in the lurch

US /liːv ˈsʌm.wʌn ɪn ðə lɜrtʃ/
UK /liːv ˈsʌm.wʌn ɪn ðə lɜrtʃ/
"leave someone in the lurch" picture
1.

to abandon someone in a difficult situation without help

:
My partner left me in the lurch when he quit the project unexpectedly.
It's not fair to leave your friends in the lurch when they need your help.