VCS can be configured with 3 DGs (this may be manually if wizard can't cope), but the problem is likely to be VVR.  The RVG you create for VVR is inside a diskgroup and therefore you would need 3 RVGs.  The volumes in each diskgroup will be consistent, but the 3 RVGs will not be consistent in async mode, meaning they are not guaranteed to be at the same point-in-time.  If the datafiles in the 3 diskgroups are from the same SQL instance then the datafiles MUST be at the same point-in-time for the data to be consistent.   This MAY work if you have 3 separate databases, each in its own diskgroup, but even then it depends on whether the 3 databases need to be in sync with each other.

Best option is to join the diskgroups which you can do in VEA or using "vxdg join" CLI if you have an Enterprise licence (SFW Enterprise licence, not SFW for MS Enterprise Windows).

See posts https://www-secure.symantec.com/connect/forums/where-can-i-verify-consistent-data-under-vvr and https://www-secure.symantec.com/connect/forums/one-rvg-going-constant-behind-and-dont-get-max-bandwidth-replicate-data-100 for more info on consistent data with databases.

Mike