When a large game like Call of Duty is split into parts (like part01 , part02 , part03 ), you must have in the same folder to extract them correctly.
While there isn't a specific "paper" with that name, "Call.of.Duty.Modern.Warfare.part03.rar" is likely a of the game files . If you are trying to use or fix this file, here is how to handle it: How to Use Multi-Part RAR Files Call.of.Duty.Modern.Warfare.part03.rar
: Single segments often corrupt during download. Delete part03.rar and download it again. When a large game like Call of Duty
: Open part01.rar in WinRAR, go to Tools , and select Repair archive . Official Installation (Recommended) go to Tools