The MMS-3 was a twin-engine high-wing monoplane of wooden construction with the fuselage covered with plywood, and the wings with fabric, intended primarily for aerial taxi operations.

It was powered by two 88 hp (66 kW; 90 PS) Pobjoy Niagara III 7-cylinder piston radial engines, driving two-bladed fixed-pitch propellers.

Miroslav Nenadović collaborated on a twin engine light bomber project called Nemi, and that was supposed to have a similar arrangement as used on the MMS-3, but with a tricycle undercarriage.

The appearance of plane Aeroput MMS-3, because of its outstanding aerodynamic characteristics, caused a great interest in France, United Kingdom, Germany and Czechoslovakia.

During a flight on the route Belgrade – Podujevo – Skoplje on 15 September 1936 it made a forced landing due to an engine failure and was damaged slightly.

It was also used for publicity purposes, taking the visitors of aero-meetings for joy-rides at minimum prices which contributed to the popularisation of aviation and air transport in Yugoslavia.

According to eyewitness reports, after the German invasion of Yugoslavia in April 1941, the aircraft was destroyed by the crew at the airport near the village of Divci in Valjevo region so that it would not fall into enemy hands.