Maaf karna, nahi aa sakta, kuch aur kaam hai

How to say “Maaf karna, nahi aa sakta, kuch aur kaam hai” in English

When you want to say “Maaf karna, nahi aa sakta, kuch aur kaam hai” in English, the natural, everyday way is “Sorry, I can't, I have something else on”. It fits denials.