French phrase
Je ne pourrai pas venir.
Meaning
I won't be able to come.
When to use it
A polite way to say attendance is not possible. It softens a refusal in business or formal messages.
Example dialogue
La réunion est demain à 10 h.
The meeting is tomorrow at 10 a.m.
Malheureusement. Je ne pourrai pas venir.
Unfortunately, I won't be able to come.