The ".part3.rar" suffix indicates that the total game data was too large for a single upload and was split into multiple segments.
You cannot extract "part3" on its own. To access the content, you must have all other parts (part1, part2, etc.) in the same folder. SnowRunner.Sezon.7.WSZYSTKIE.DLC.part3.rar
Multi-part archives from unofficial sources are common vectors for malware. Always run an updated antivirus scan on the folder after extraction. Are you having trouble extracting this specific part, or This specific pack likely includes: Search & Recover
In the SnowRunner community, these types of files usually include the base game plus all previous seasonal content (Year 1 and Year 2 Passes). This specific pack likely includes: Search & Recover (Kola Peninsula) Season 2: Explore & Expand (Yukon) Season 3: Locate & Deliver (Wisconsin) Season 4: New Frontiers (Amur) Season 5: Build & Dispatch (Don) Season 6: Haul & Hustle (Maine) 4. Technical Precautions or In the SnowRunner community
If "part3" is corrupted during download, the entire extraction will fail. Most users use the "Keep broken files" setting or Redownload the specific part if a CRC error occurs.