Background <p>Localised Spectrum Analysis is a full-field measurement method which enables processing optimal patterns (<i>i.e.</i> checkerboard patterns) and obtaining high metrological performance. However, LSA was still limited to 2D cases.</p> Objective <p>This paper presents stereo-LSA, an extension of the method for stereo image pairs, enabling the measurement of the 3D displacement field on sample surfaces engraved with optimal checkerboard patterns.</p> Methods <p>A standard stereo procedure is followed. The LSA formulation is updated to take into account global rotations induced by the stereo angle.</p> Results <p>The technique is applied to three different cases. A synthetic case is used to validate the stereo implementation, and a comparison is proposed with stereo digital image correlation, routinely used in the community.</p> Conclusions <p>Stereo-LSA enables measuring 3D-displacement field on a sample surface prepared with checkerboard patterns, leading to high metrological performance.</p>