How do I deactivate a product/SKU temporarily?
1. Click "Products" --> "Manage Products".
2. Scroll through the product list or use the search box to locate the item you wish to deactivate.
3. Go to “Active” tab then click the green button (ON) to turn OFF.
You should also check first the Reserved Stock by Clicking the pencil icon under available tab. If in case that there are Reserved Stock, you have to serve those orders since it's already on your pending tab in seller center.