BS3 or BS-3 may refer to: BS3, a BS postcode area for Bristol, England BS3, a center drill bit size 100 mm field gun M1944 (BS-3), a 1944 Soviet gun BisSulfosuccinimidyl suberate, a crosslinker used in biological research Bežigrad neighbourhood number 3, a living settlement in Ljubljana, Slovenia B-s3, a variant of the Antonov A-1 aircraft BS 3, Report on Influence of Gauge Length and Section of Test Bar on the Percentage of Elongation, a British Standard BS-III Bharat Stage emission standards in India BS3, a brass right-hand threaded Gas cylinder valve
See also BS-3A, a Yuri (satellite)