Ensure you aren't missing "part01.rar" or "part02.rar," as the extraction cannot begin without the first volume.
This is the third part of a multi-part compressed folder. To extract the game, you must have all parts (part01, part02, etc.) in the same folder and use a program like WinRAR or 7-Zip to extract the first one. The Sims 4 (v1.93.129.1030) ALL IN ONE.part03.rar
Version 1.93.129 was the "Pastel Pop" and "Everyday Clutter" kit update. It is now significantly outdated. Important Considerations Ensure you aren't missing "part01