[Hundredth0006]

Yes. If you are, for example, even a US citizen, permanently living in Crimea, you are still subject to limitations, imposed by sanctions.

[jaas]

I'm not sure if you're talking generally about sanctions or specifically about Let's Encrypt, but to avoid any doubt: citizens of Crimea are free to use Let's Encrypt. We do not, however, serve government entities in occupied Crimea.