Worcestershire hope Sohail Tanvir can finally join the county this weekend for their Twenty20 campaign.
The Pakistan paceman was initially due to be available for the entire 10 group matches as a replacement for compatriot Saeed Ajmal.
But he was unable to link up with the club as planned when he was called into Pakistan's squad as an injury replacement for the one-day internationals in Sri Lanka.
His arrival at New Road was then further delayed while his visa was being processed in Islamabad.
Worcestershire chief executive David Leatherdale said on Thursday: "We are now just waiting for the visa to be rubber-stamped in Pakistan.
"As soon as that happens, Sohail can jump on a plane straight away and be here.
"If that happens imminently, which we believe is the case, he will hopefully be here in time for the game at Somerset on Sunday.
"The delay is frustrating but we have no control over what happens several thousand miles away.
"If Sohail is here for Sunday, it would still mean he could play in the remaining group games."
