After Guatemala lost to Cuba, 2-1, in Havana on Oct. 15, Coach Ramon Maradiaga was fired and replaced by Monterroso, who previously coached Guatemala and led it to the 2000 Olympic Games.
The loss left Guatemala three points behind Trinidad & Tobago going in Wednesday's final day of group play for Concacaf's semifinal round.
Guatemala will need to beat the United States and hope T&T loses to Cuba at home to take second place behind the United States and move into next year's Hexagonal.
Monterroso, known as "Mincho," dropped goalie Ricardo Trigueno and Ruiz, two key players for Maradiaga.
Goalkeepers -- Luis Pedro Molina (Jalapa), Ricardo Jerez (Atletico, Uruguay).
Defenders -- Jaime Vides (Municipal), Claudio Albizuris (Municipal), Cristian Noriega (Municipal), Carlos Castrillo (Comunicaciones), Wilson Lalin (Suchitepequez), Mercedes Vasquez (Mixco), Luis Rodriguez (Xelaju), Yoni Flores (Marquense).
Midfielders -- Wilfred Velasquez (Suchitepequez), Carlos Castillo (Suchitepequez), Fredy Thompson (Veracruz, Mexico), Jean Marquez (Comunicaciones), Marco Pappa (Chicago Fire, USA), Carlos Figueroa (Xelaju), Guillermo Ramirez (Municipal).
Forwards -- Mario Acevedo (Municipal), Marvin Avila (Municipal), Mynor Ignacio Lopez (Xelaju).