Hi,
Unfortunately, once you have deleted a disk and/or virtual machine it can't be undeleted. If you have a backup of the VM you could restore it and its disk(s), or if you have a snapshot of the disk you could use that to create a copy of the disk.
If you have an existing backup and/or disk snapshot and you are unsure how to restore the VM/disk, please add a comment below and I will assist.
Please click Accept Answer and upvote if the above was useful.
Thanks.
-TP