U.N. Missing Countries

Europe (completed)

Africa
Angola, Central African Republic, Comore, Congo, Congo (Dem. Rep.), Djibouti, Equatorial Guinea, Eritrea, Gabon, Liberia, Libya, Niger, Sao Tomé and Principe, Sierra Leone, Somalia, South Sudan, Zambia

America 

Saint Kitts and Nevis, Saint Lucia

Asia

Timor-Leste, Yemen

Oceania

Marshall Island, Nauru, Palau, Samoa, Tonga


World Missing Territories
American Samoa, Anguilla, Bonaire-Sint Eustatius and Saba, British Virgin Islands, Falkland Islands (Malvinas), French Southern Territories, Gibraltar, Kosovo, Montserrat, Niue, Nothern Mariana Islands, Pitcairn, Saint Barthélemy, Saint Martin (French part), Saint Pierre and Miquelon, Sint Maarten (Dutch part), South Georgia and the South Sandwich Islands, Tokelau, Turks and Caicos Islands, U.S. Minor Outlying Islands, Virgin Islands of the USA, Wallis and Futuna, Western Sahara