A former world and Commonwealth champion, Montsho finished fourth in Tuesday's 400m final as Jamaica clinched a clean sweep of the medals in Glasgow.
On Saturday, it was confirmed that Montsho had tested positive for a banned substance, with the CGF suspending the 31-year-old pending the result of a B sample.
"In accordance with the CGF Anti-Doping Standard for the XX Commonwealth Games, the CGF Federation Court conducted a provisional hearing this afternoon to consider an adverse analytical finding submitted by Amantle Montsho of Botswana, after the women's 400 metres final on July 29," a statement on the CGF's website read.
"The athlete's A sample was found to contain methylhexaneamine, prohibited as a stimulant under class s6 of WADA's Prohibited List.
"Ms Montsho was notified of her A sample result and has asked for her B sample to be tested, which will take place at the accredited laboratory in London on Monday, August 4.
"Ms Montsho attended the provisional hearing of the Federation Court, presided by CGF vice-president Bruce Robertson, which ruled that the provisional suspension of the athlete will continue.
"Upon receipt of the analysis of the athlete's B sample, the Court will reconvene to consider the matter further."