CSA was due to send a security delegation to Pakistan next month to assess arrangements ahead of the tour, cricket website ESPNcricinfo reported.
“I’d like to stress that security was not an issue in asking the PCB for this postponement. We will now work together to find an appropriate window in the international cricket calendar,” CSA acting chief executive Jacques Faul added in a statement.
“I have assured my counterpart at the PCB, Wasim Khan, that the tour remains very much on our international schedule.”
Pakistan successfully hosted two tests against Sri Lanka in December – their first at home since a militant attack on Sri Lanka’s team bus in Lahore in 2009 that left six security personnel and two civilians dead and six players hurt.
The country then hosted Bangladesh in a three-match T20 series last month and won the opening test against the same opponents in Rawalpindi on Monday. The second Test begins on April 5 following an ODI.