Phrases Offering and Refusing Help

I wish I could, but I'm completely snowed under.

C1

Meaning

I'm extremely busy and unable to help.

Example sentences

John: Could you assist me with this presentation?

Alice: I wish I could, but I'm completely snowed under.

John: Is there any time in the next week you might be free?

Alice: I'm afraid not. I wish I could, but I'm completely snowed under.