Meanwhile, in Brazil, a poll showed that President Luiz Inacio Lula da Silva was leading a potential second-round vote in the October presidential election against opposition Senator Flavio Bolsonaro.
Separately, the country's Treasury has asked the Senate for authorization to issue up to $35 billion a year in international debt markets, part of a strategy to increase the share of foreign-currency-linked debt in its portfolio.
Brazil's Bovespa share index .BVSP declined 1%, but the fall was contained by a 2% gain in state-run oil firm Petrobras PETR4.SA after it reported strong Q2 production figures.
The real BRL= gained 0.5%.
Equities in Argentina .MERV added 0.3%, while Mexico's benchmark .MXX declined 0.7%.
Argentina's currency ARS=RASL was trading higher 0.3%, but Mexico's peso MXN= was muted.
In Peru, Keiko Fujimori was sworn in as the nation's first-ever elected female president on Tuesday, extending the broader rightward shift in the region.
Local equities were trading 0.3% lower, while the sol PEN= firmed.
Separately, Bolivia reached an agreement with the International Monetary Fund on a program worth about $1.9 billion to support the country's economic reform agenda.