ご多忙のことと存じますが、お時間が許すようでしたらの英語

I am sorry for the late reply. I have been very busy.

He is busy, so he doesn't have a lot of time to spare.

There are times when I am busy, as there are times when I'm not.

There are times when I am busy and times when I am not.

I am sorry for pressing you. You must be busy.

Please come around someday when you aren't busy.

I would gladly help you, only I am too busy now.

An invitation is an unwelcome favour to a busy man.

Being too busy with work is a problem, but then so is having too much free time.

Thank you for your time despite being extremely busy.

I forgot that since I was very busy.

I was too busy to take note of time.

I'm traveling on a tight schedule. I don't have the time.

I was very busy and I forgot that.

Are you busy?—I suppose you could call it that.

If I were free, I would accept your invitation.

I will do that job if I have time.

You seem busy as usual.

Because you are running out of time, please abandon it.

I can't help you. As a matter of fact, I'm very busy just now.

If I get time, I will.

With luck I ought to be free by 4.

If you have time,

Please reply when you have a time.

Sorry to ask this of you when you are busy but,

When you have time

Although you are busy you make time to meet me over and over again.

Sorry that I am troubling you even though you are busy.

It's alright if you do not have time.

If the timing's right I'd like to ask you to work again.