How do I suppress the local country on address labels?
This extension
https://github.com/eileenmcnaughton/nz.co.fuzion.civitoken

Has a token called 'Conditional country' - which does that
https://github.com/eileenmcnaughton/nz.co.fuzion.civitoken/blob/master/tokens/address.inc#L7

You can use the token in the mailing label
http://dmaster.demo.civicrm.org/civicrm/admin/setting/preferences/address?reset=1