German phrase
Ich werde ~ nicht einhalten können.
Meaning
I won't be able to keep ___
When to use it
Says you can't keep it. Often signals a missed plan or promise and may invite an alternative.
Example dialogue
Ich werde den Termin nicht einhalten können.
I won't be able to keep the appointment.
Kein Problem, wann passt es dir denn?
No problem. When would be convenient for you?