Unable to deploy vSAN witness appliance 8.0U3g version.
VMware 8.x
The vSAN Witness Appliance version 8.0 U3g is currently unavailable for download on the Broadcom support portal
The vSAN Witness Appliance version 8.0 U3g is currently unavailable for download, and there is no official communication regarding its future availability.
Deploy the vSAN witness appliance using 8.0U3e first and then perform the patch upgrade to 8.0u3g
VMware vSAN Witness Appliance for vSAN 8.0U3e OSA
The below link has the details related to 8.0u3g build