Diastella buekii is listed as Critically Endangered. Only four subpopulations of this species remain, and it is still severely threatened by agricultural development, mining and alien invasion. The estimated number of individuals remaining is 700. Due to agricultural activities, most of the habitat type of the species has been destroyed; only a few isolated remnants still exist. None of these remnants has any formal conservation protection status. One of the sites where this species is found is a declared National Heritage site but this status does not provide sufficient conservation protection for the species. Currently a process is under way to transfer land from the Forestry Department to Cape Nature to be included in the network of protected areas. Other potential threats to the remaining populations include afforestation, road verge clearing and water table depletion.