I've moved this thread over to its area of support.
Note: I have an HTC EVO 3d phone with an 8GB SD card. I can only installed three games and X amount of applications that has X amount of MB. Even though I still have X amount of space remaining; I'm not able to download another application that has X amount of MB even though i have more space available. Almost all applications is installed on the phone, not the SD card. So there might not be enough room for some applications. The thing is an 8GB SD card is not big enough to install some of these applications. So, if you're having problems with an application then you need to uninstall that app.
You can either "reset" the device to its factory state - and reinstall your application starting with the problematic one(s) first. Or as I've said in my earlier post -- replace the 8GB SD card with a bigger one.