日本語をクリックすると英文が表示されます。まずは自分で英語にしてから答え合わせを。
I'm sorry, this is on my end, but...
To put it without ruffling any feathers...
I'm terribly sorry, but could you bear with me a moment?
I'm sorry for the trouble, but thank you in advance.
Whenever it's convenient for you is fine.
I hope this isn't too personal, but...
Please don't trouble yourself; carry on.
Only if you're comfortable with it.
Just to add, for the record...
I'm sorry, I should have been more thoughtful.
If I may be so bold, let me make a suggestion.
Please, only as far as it's reasonable for you.