There skin is shiny black or dark brown with red spots, orange or yellow. Three is further distinguished from other similar dendrobatids because it has the first and second toe of the foot fused, characteristic shared only with a close species, Andinobates daleswansoni. Males are between 16.2 and 17.1 mm in length and females between 17.5 and 19.4 mm.
It is among the leaf litter in forests well preserved and with good canopy and presence of bromeliads, which lays its tadpoles, which cares for and carries on the back to a water source. It feeds on insects, especially ants.
It was discovered by Oscar Javier Gallego Carvajal of the University of Tolima in a fragment of forest in the village of El Llano, in Falan. The description of the species was made along with José Vicente Rueda Almonacid, Marco Rada, J. Sánchez Santiago and Alvaro Pacheco Alvarez Andres Velasquez, Colombia and Conservation International was published in Zootaxa in 2006.