This tells you that this specific file is the third part of a larger sequence. To successfully extract the data, you generally need all the parts (e.g., .001, .002, and .003) in the same folder.
Here is everything you need to know about what this file is and how to use it. What is this file? CGSTASS.7z.003
While "CGST" commonly refers to Central Goods and Services Tax in India, in the context of a compressed file, "CGSTASS" likely refers to a specific dataset, software backup, or an internal naming convention for an "Asset" or "Assessment" package. How to open and extract CGSTASS.7z.003 This tells you that this specific file is