[1] During its period of production between 1960 and 1999, 13,991 powered units and 122 unpowered trailers were sold worldwide.

(SU for Soviet Union) As with the T2SU, the first T3SU was delivered with the modification of removing the middle door and replacing it with seats.

Altogether 11,368 T3SU were delivered, making it the largest production of a single type of streetcar worldwide.

(SUCS for Soviet Union-modified Czechoslovakia) Originally, the production of the T3 was stopped in 1976 and focus shifted to newer vehicles.

The closed operator's cab was maintained, the vehicles had all three doors in place, and differed from the original T3 only in a few details.

Exterior details: Interior: (D for Deutschland) In East Germany the first three T3D cars started operation in 1964 and the city of Dresden got its first delivery in 1965.

However, due to reduced available power, the maximum speed of the streetcar reached only 55 km/h instead of the usual 65 km/h (40 mph).

In most Czech cities and in some others such as Bratislava, Moscow, Riga, and Odesa, Tatra-T3 trams became very common.

This was one reason for modifying existing trams rather than replacing them with newer stock (the other being cost).