If you'll excuse me, I really must circulate.

对不起，我真得去应酬一下了。

《柯林斯英汉双解大词典》

Now if you'll excuse me, I'm a very busy man.

如果可以，我先行一步了。我很忙。

《牛津词典》

If you'll excuse me, I'll go to my room.

如果你不介意，我想回房间去。

youdao

And now, if you'll excuse me, I have an appointment to keep -- with GarageBand.

CNN: How to solve work-at-home ethical dilemmas

But in 2011 the tide swept back in and I'm only now just getting my head above water, if you'll excuse me using the holiday metaphor again.

BBC: Bipolar holiday