The Nikon S3 is a professional level, interchangeable lens, 35 mm film, rangefinder camera introduced in 1958.

It was manufactured by the Japanese optics company Nippon Kogaku K. K. (Nikon Corporation since 1988).

[3] The S3 is mechanically similar to the Nikon SP except for a simplified viewfinder system.

The viewfinder does not compensate for parallax error and the framelines are fixed (etched).

In 2000, Nikon introduced an updated, hand-assembled S3 model to celebrate the new millennium.