International distributors (where they exist) often lag behind the Japanese release.
The most reliable place to find the updated Episode 3 is through official Japanese digital distribution platforms or physical Blu-ray releases. Sites like DMM (FANZA) typically host the latest episodes for the Japanese market.
Episode 3 exists but is primarily available through Japanese digital retailers. If you are looking for a subtitled version, checking enthusiast forums or official Japanese storefronts like FANZA is your best bet for the most recent version.