Please excuse me, but there is something I must say.

请原谅，不过有件事我必须说一下。

《柯林斯英汉双解大词典》

Sorry. Please excuse me.

对不起。请原谅我。

youdao

Please excuse me for being impolite.

请原谅我的无礼。

youdao

Now please excuse me while I figure out how to get Rover to turn around and utter an expletive whenever it bumps into something.

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Please excuse me while I suppress the vomit approaching my esophagus.

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So please excuse me for a moment.

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