The 25-year former Ajax Cape Town player has been a pillar of strength for the Citizens since returning to the PSL after spending three seasons with Milano United in the National First Division.
'Tarra', as Fielies is affectionately known, says his inclusion in the national team was a welcome shock.
"Wow! I was totally shocked and pleasantly surprised when my team manager broke the news to me," Fielies tells KickOff.com.
"It still feels very surreal and I'm still flooded with emotions as this call-up means a lot to me. This season has been a good experience with City back in the topflight.
"I also need to take this opportunity to thank my Cape Town City club, the chairman, my coach and all my teammates - this is down to your hard work as well."
The announcement of the final squad of 20 players that will participate in the regional tournament will be made on May 17, and those players must be registered with COSAFA by May 20.
Bafana will assemble on May 26, a day before tournament kicks off in Polokwane. It runs until June 9.