The Rio Suaçuí Pequeno is a river in the state of Minas Gerais in southeastern Brazil, with coordinates approximately 18°57′S 42°03′W. It originates in the municipality of Peçanha and runs approximately 150 km before joining the Rio Doce. Along its course it passes through municipalities including Coroaci and Governador Valadares. The district of Santo Antônio do Porto, located roughly 40 km from Governador Valadares, is one identifiable point along the river corridor.

The river is part of the larger Bacia Hidrográfica do Rio Suaçuí, which encompasses 21,555 km² entirely within Minas Gerais and constitutes the largest of the nine sub-basins forming the macrobacia of the Rio Doce. The Suaçuí Pequeno sub-basin is one of three principal components of this watershed alongside the Rio Suaçuí Grande and the Rio Corrente Grande.

Fish species recorded in the river include Trahira, Redbreast tilapia, Spotted pimelodus, and Speckled peacock bass, suggesting a reasonably diverse freshwater fauna typical of the Rio Doce drainage system.

Specific paddling information — including access points, hazards, water levels, water quality, facilities, and recommended routes — remains limited. Paddlers planning a trip on the Rio Suaçuí Pequeno are advised to consult local contacts in Governador Valadares or the CBH-Suaçuí watershed committee for current conditions and logistical details before committing to a trip.