The absolute definitive way to access Episode 3 with its highest original bit-rate and uncut footage is through official Japanese storefronts.
Because Kuroinu is strictly an adult dark fantasy (containing extreme themes, explicit content, and heavy non-consensual elements), it is completely banned from mainstream streaming platforms like Crunchyroll, Netflix, or Hulu. The absolute definitive way to access Episode 3
If you're tracking down the elusive third episode of the dark fantasy series Kuroinu: Kedakaki Seijo wa Hakudaku ni Somaru and heavy non-consensual elements)