When the club signed the overseas players they said Zampa would be available for group stages. They were silent on Delport but did say he would come back for final day. I am assuming he will play in quarter final.
Amir has been selected for Pakistan one day squad. The first game is 27 September but there is currently a training camp which he, along with others, were allowed to join after the Blast so they could fulfil the county commitments. I'm not sure therefore when he has to return as originally he was due back on Aug 16