PY21 in Juan de Mena, CR PY22 and PY08 in San Estanislao, SP PY13 in Curuguaty, CY PY07 in Katueté, CY National Route 3 (officially, PY03, better known as Ruta Tres) is a highway in Paraguay, which runs from Asunción to the border city of Salto del Guairá, the capital of the Canindeyú Department.

It crosses the Capital District and 4 departments.

It has many junctions with other national routes.

The following table shows the distances traversed by PY03 in each different department, showing cities and towns that it passes by (or near).