"I think I'm going to head off. Sorry for disturbing."
- Is it natural to say "Sorry for disturbing" after you have "disturbed" someone?
- Should I add "you" after "disturbing" or is it not necessary?
"I think I'm going to head off. Sorry for disturbing."
Yes, you need to say what was disturbed: "you", "your room", "the fish tank", "the experiment". Sorry for disturbing your Aunt Jane.
"Interrupting" is different: Sorry for interrupting. Sorry for interrupting you. Sorry for interrupting the meeting. These are all OK.