Entry Requirements : For US citizens only.
A passport is required. U.S. citizens do not need a visa for a visit of less than three months.
In an effort to prevent international child abduction, many governments have initiated procedures at entry/exit points. These often include requiring documentary evidence of relationship and permission for the child's travel from the parent(s) or legal guardian not present. Uruguayan authorities require that a notarized statement from the non-travelling parent granting his/her authorization for the travelling parent to leave the country with the child be presented to immigration officers at the airport, port or land border crossing. If a child travels without both parents, even in a group, then both must sign the document (permiso de menor).
Passport Requirement for Uruguay
Valid passport required by all except:
Embassies and consulates in Uruguay