Is there a word with phobia suffix for fear of waking others up?
Solution 1:
It would be considered a phobia if just the thought of awakening someone from sleep aroused autonomic symptoms in you. You'd feel nervous, breathe fast, have strong heartbeats, or any other undesirable symptom. Otherwise, I would say that you are pretty much concerned for the well-being of your folks. A sensible and conscientious person.
But, to answer your question, assuming it is a phobia, I can only come up with "atelophobia" which means "fear of imperfection" which is not specific for what you are looking for.