--- Windows 7 Service Pack 3 Iso ((top)) Download 64-bit Offline File

While there isn't an official Service Pack 3 for Windows 7, we can consider the updates and fixes that are included in the latest cumulative updates. Some of the key features and improvements in Windows 7 include:

After installing your custom ISO offline, you will see: --- Windows 7 Service Pack 3 Iso Download 64-bit Offline

trust random file‑sharing sites, torrents, or “free download” portals. Those copies are often tampered with, may contain malware, or are missing critical security updates. While there isn't an official Service Pack 3

Let us address the elephant in the room immediately: may contain malware

No. Microsoft ended support for Windows 7 on January 14, 2020. There is no official SP3.