chargé d'affaires
From Longman Dictionary of Contemporary Englishchargé d'affaireschar‧gé d'af‧faires /ˌʃɑːʒeɪ dæˈfeə $ ˌʃɑːrʒeɪ dæˈfer/ noun (plural chargés d'affaires (same pronunciation)) [countable] an official who represents a particular government during the absence of an ambassador or in a country where there is no ambassadorOrigin chargé d'affaires (1700-1800) French “person given responsibility for affairs”