How to restore items from the SharePoint recycle bin
Deleted
items will be moved to the Recycle Bin where they will stay for 30 days before
permanent removal. There is a recycle bin for each site, so it is important to
navigate to the correct site to retrieve items.
i) Navigate
to the site from which the items were deleted.
ii) From
the menu on the far left of the screen select Recycle bin.

iii) Select
the items you wish to restore by enabling their check box.
iv) Click
Restore Selection. Click OK to confirm. The items will be
restored to the previous location they were in, before they were deleted.
(Warning:
the Delete Selection link will permanently delete the items selected).