A new species, Impatiens minnamparaensis, belonging to section uniflorae is described and illustrated from southern Western Ghats of Kerala. It is morphologically similar to Impatiens sasidharanii but can easily be distinguished in having ovate-oblong leaf, milky white distal lobe of keel petal, red blotch on lower sepal, pollen architecture and capsule morphology. It is also showing similarities with I. rupicola but differs in shape of lower sepal, shape of distal lobe, number of flowers per axil, anther, pollen and capsule morphology. Impatiens minnamparaensis is assessed here as Endangered based on the categories and criteria of the IUCN Red List.