Shahid Afridi is still unavailable for Hampshire after a court upheld the decision to prevent the former Pakistan captain from playing abroad.
The hearing of Afridi's petition against his punishment - which was handed out by the Pakistan Cricket Board (PCB) for an alleged breach of conduct - has been adjourned until June 16.
But the effective ban will stay in place in the intervening period, meaning his debut for the Royals in the Friends Life t20 will have to remain on hold.
"The court has adjourned the hearing until June 16 and has upheld the decision of the PCB to revoke NOCs for Shahid Afridi," PCB lawyer Tafazzul Rizvi told AFP.
The PCB has suspended Afridi and served him with a show-cause notice, as well as revoking all the no-objection certificates that allowed him to play in England and Sri Lanka.
The sanctions were handed out after Afridi, who has been at the centre of a rift with team management, criticised the PCB after announcing his retirement from international cricket.
On Tuesday, the Sindh high court ordered the PCB to adjourn a disciplinary meeting and summoned officials to appear in court on Thursday.
Afridi filed the petition against the PCB to after Pakistan coach Waqar Younis and manager Intikhab Alam described him as "immature and unwilling to listen" in tour reports leaked to the press.