A site cannot be deleted but it can be made temporarily inactive which means that new subjects cannot be created although subjects created while the site was active may still be edited.
Sites can be changed between active and inactive at any time.
Select Tasks > Site > Site Administration or right click on the current database icon in the tree view in the left hand panel and select Site Administration... from the popup menu. A list of existing sites is displayed.
Highlight the site whose status you want to change.
Click the relevant status button. If the site is currently active, only the Inactive button will be available. If the site is currently inactive, only the Active button will be available. The status will change immediately.