Excuse me for a moment is a polite way of leaving briefly. Excuse me for a moment, I must take this.
It promises a return, which is what separates it from a farewell. It is used for a phone call, a door or the next room.
1phraseexcuse me for a momentA polite way of leaving briefly.
“Excuse me for a moment while I see who that is.”
excuse me for a moment is a phrase.
Practised in Small Talk & Everyday Phrases