"to let down, to fail someone; to bring up to" is Подвести in Russian.
Подвести means "to let down, to fail someone; to bring up to" in English.
Listen to the pronunciationWord #2760 of 4,000 by frequency in Russian — level B2.
Прости, я не хотел тебя подвести в трудный момент.
Sorry, I didn't want to let you down at a hard moment.