Deleting a partition removes its drive letter and file system entry from Windows. The data may still exist until new partitions or files overwrite the old space.

If you need the files urgently, recover files first. This avoids extra writes to the deleted area. If the partition table is only slightly damaged and you need the original drive letter or folder structure, partition repair may help, but it should be done after important files are copied elsewhere.
Step 1. Open Qiling Data Recovery and select the disk that contained the deleted partition.

Step 2. Start a scan. If the original partition name or folder tree appears, open it and preview key files.
Step 3. Filter the results by file type, name, or modified date to reduce the list.
Step 4. Recover files to another disk, not to the deleted partition area.
Step 5. After important files are safe, recreate the partition in Disk Management or a partition manager if needed.

Partition deletion is recoverable in many cases if you stop using the disk. Recover files first, then recreate the partition after data is safe.