No. It is an independent country which was a former British colony.
Mexico
Mexico is the largest country out of Mexico, Belize, and Nicaragua.
Belize, Guatemala, El Salvador, Honduras, Nicaragua, Costa Rica and parts of Panama as well as today's US States of California, Nevada, Utah, Texas and parts of Colorado, Arizona, New Mexico, and Wyoming.
Belize is bordered by Mexico, Guatemala, and the Carribean Sea and Yucatan Peninsula. Hope this helped!
Guatemala and Belize, southeast of Mexico.
No. Belize is a Caribbean, independent country whose capital is the city of Belmopan; Mexico's capital is Mexico City.
In present day Belize, Mexico, and Guatemala.
Mexico, Belize, Guatemala and Honduras.
Guatemala and Belize.
Not really: Belize has shores on the Caribbean sea, and the straight-line distance between Belize and the Gulf of Mexico (via Mexico) is roughly 400 Km (250 miles).
Belize qualifies as such (Belize is a country, and its capital is Belmopan).
The two southern neighbors of Mexico are Guatemala and Belize.