

Hmmm… lately I’ve been reading a couple Japanese authors, Akimitsu Takagi and Seishi Yokomizo, in case you’re interested. (Not all set in remote places, but part of the classic murder mystery genre within a very different culture from Agatha Christie.)
Yes, and I was also humorously referring to the entire murder-in-a-small-town genre, including Midsummer, Cabot Cove, Shetland, and innumerable villages and small towns in… Wales, South Africa, Australia, France, Norway, all over the rural US, in both present and past eras.
The insularity being a contributor to motives for murder, between land disputes, scandalous secrets being hidden until they fester, and people who don’t have the option or opportunity to get away…
I wasn’t referring to the horror/slasher genre, but some of those fit as well.