Jaime Alguersuari will not compete in the second season of Formula E, as he is still awaiting a diagnosis for the health problems that resulted in his licence being suspended.
The ex-Formula 1 driver relinquished his Virgin Racing seat for June's London finale after fainting at the conclusion of the Moscow race, and having his licence temporarily suspended by the FIA.
The Spaniard is awaiting the results of further testing, and has confirmed that he won't be on the grid when the team starts its partnership with Citroen's DS brand, in Formula E's second season.
"During the month of July I underwent several tests for which there has not been a medical resolution and I am still waiting for the final diagnosis," he said in a statement.
"For this reason I need to announce that, unfortunately, I will not be able to take part in the FIA Formula E Championship for the 2015/16 season with my team DS Virgin Racing.
"I want to wish good luck to the team in the new championship and thank everyone for their support.
"In September I will announce my future plans."