as far as I know, if a thread was deleted everyone who posted on that thread even the one who created the thread won't get a notification message(I've had several threads of mine got deleted in the past and didn't get any notification). also, looking on OP deleted post on LoyceV's "unedited/deleted post" thread. you'll see that in most of it only OP's post was deleted and not the whole thread or he posted on a moderated thread.
That`s what I thought, it will be deleted without any messages or notifications that your replied or post was deleted. It may give you notifications when your message is directly deleted or report for some reasons.
Our message was deleted because of over-quoting just like what above said and sometimes we posted some irrelevant replied to the thread. It can trigger as spamming activity because we move to a certain discussion that the thread does not need. Sometimes, we can`t avoid that because our idea is subjected and we posted based upon to our own opinion.
Here is the tool that Loyce V shared in forum:
https://loyce.club/archive/posts/