Before We Start: This article outlines the process for restoring SharePoint files and folders that have been deleted from a SharePoint site.
Step 1: Navigate to the SharePoint site.
Step 2: Click Recycle Bin
Step 3: Select the files and/or folders to be restored.
Step 4: Click the Restore button at the top of the page.
Note: After these files/folders have been restored, they will moved from Recycle Bin to the document library/folder that they were originally deleted from.