Shader Model 3.0 is a hardware standard . It requires a physical chip on the graphics card that understands those specific instructions.
Before hunting for a download, let us decode the terminology. pixel vertex shader 3.0 download
You cannot download "Pixel Vertex Shader 3.0" as a standalone piece of software. It is a hardware feature built into the GPU. However, you can download the drivers or software wrappers that enable it—or emulate it for older hardware. Shader Model 3
Or simply: "Vertex Shader 3.0 not found." pixel vertex shader 3.0 download
Beware of websites offering "Pixel Vertex Shader 3.0 Download Free Full Version" or "shader30_fix.exe." These are almost always: