I would like to share something that has worked for me in similar situations.
Two words: FOR NOW
That may be enough to get others to consider your situation as possibly temporary. And that may be enough to postpone the inevitable questions indefinitely.
”I have a personal situation that makes fulfilling my current elder responsibilities very difficult and stressful. I need to step down FOR NOW.”
Leave it open ended. You may know that you don’t plan to return to being an elder, but you don’t have to share that information with anyone.