If a full user file is sent to Totara via Totara Sync, does the user already exist in Totara but not in the user file be automatically deleted, or suspended?

Ideally we would like to suspend certain user accounts and to do it through suspend flag via delta user file. And wondering when a delta file cannot be produced we have no choice but to submit a full file.

Reading this help site for Totara 2.6: http://help.totaralms.com/Manage_Elements.htm, it states an option "Remove Item" should appear but I can't locate it on our Totara 2.6. If it does appear and if we select "Keep", does it keep the account active, or would automatically suspend the account when the user is no longer included in the full user file?

Wondering anyone have similar issue/questions or can provide some help.

Thank you.