Viana was part of Uruguay's youth team set ups, including the U20 squad that competed in the 2003 South American U-20 Championship held in his native Uruguay.
American | South Africa | American Civil War | American Broadcasting Company | New South Wales | American football | South Korea | South Australia | African American | South America | American Idol | South Carolina | American Revolutionary War | 2003 | American Revolution | South Dakota | 2003 in music | American Association for the Advancement of Science | American Red Cross | University of New South Wales | South Island | South India | American Library Association | American Museum of Natural History | American Express | American Academy of Arts and Sciences | South Park | American League | South Vietnam | American Association |
The three best performing teams qualified for the 1977 FIFA World Youth Championship.
The three best performing teams qualified for the 1983 FIFA World Youth Championship.
Ukraine and the Czech Republic were relegated to Division B.
Nathaniel played for Papua New Guinea U-20 in the 2001 OFC U-20 Championship held in the Cook Islands and New Caledonia.