The Zimbabwe Cricket Union (ZCU) were last year incorporated into the South African domestic structure and took part in the limited overs and Twenty20 championships as part of efforts to help the country rebuild their game after years of infighting.
But, CSA president Norman Arendse said in a statement: "In the light of the worsening situation in Zimbabwe, CSA has reviewed its position in relation to Zimbabwe cricket. We have decided to suspend our bi-lateral agreements with the Zimbabwe Cricket Union until further notice.
"In the past, CSA has defended Zimbabwe cricket against heavy odds, but the general situation in Zimbabwe has now made this untenable.
"We will continue to comply with the International Cricket Council's future tours programme regarding Zimbabwe, as we are bound to this programme as a full member of the ICC."
