Hyper-v Snapshot compact issue

Hello All,

I have Hyper-v machine with three snapshot. All the snapshot size around 200GB. The total this Hyper-v machine size 800GB and physical HDD size 1TB. Now i need to delete the hyper-v snapshot and run the compact as because of Hyper-v HDD issue. But i cannot run the delete snapshot due to Physical HDD size issue. Is their any way to delete snapshot on existing HDD size.

Please suggest