expression
I'm sorry; excuse me; my apologies
A polite, somewhat formal apology or expression of regret, often used when leaving a room, ending a call, or after a minor mistake. More formal than すみません.
先に失礼しました。
I'm sorry for leaving before you.
お電話を切る前に「失礼しました」と言った。
Before hanging up, I said, 'I'm sorry (for the intrusion).'