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The March 693 was a Formula 3 race car, which was built by March Engineering in 1969.

The March 693 was a single-seater and the first racing car which March had produced. The car had a simple square tubular frame, the suspension was used from existing race cars, being the system that Brabham and Lotus adopted.

The first race which a March 693 was entered in was at Cadwell Park in 1969 where Ronnie Peterson finished third. The car was used by the factory team only twice. Ronnie Peterson was killed in a race at Montlhery. The car was repaired and James Hunt drove it for the British Formula 3 Championship at Brands Hatch, but he had to give up.