An album marked as deleted will be permanently purged after 72 hours. Within this timeframe, it is still possible to recover it as follows:

Start by clicking on Albums in the top banner. This will take you to the Albums page.

By default, you will not see deleted albums, so you must click on the trashcan filter icon at the top right to display them.

Then click on the album to open it.

Now, click the trashcan icon in the left-side panel to toggle the deleted setting. This will make the archive active again so you can continue working with it.