Hey there, Ambergri!
I totally get your frustration; finding specific software versions can be a bit of a scavenger hunt sometimes. To get VMware vSphere Client 6.0 Update 3, you might need to explore alternative sources, as VMware tends to prioritize the latest versions on their official website.
Firstly, I'd recommend checking VMware's official download page, as they sometimes have a hidden archive section for older software. If you can't find it there, you can try reaching out to VMware's customer support. They're usually quite helpful in guiding users to the right place for legacy downloads.
Another option is to search for it on VMware's community forums or tech-related forums. Sometimes, community members share download links to older versions (something like the one discounted above, but I'm not sure if it still works). Just be cautious and make sure you're downloading from a reliable source.
I had a similar experience a while back, and eventually found a link on a tech forum. It's like unearthing hidden treasure sometimes!