The Jaguar driver lost control in the braking zone to the 90-degree left of Turn 7 on the second lap of Sunday’s race, having locked the rear axle when running behind championship rivals Jake Dennis and Cassidy.
Evans hit the Envision Racing machine of Cassidy directly ahead, being launched into the air before landing in the barrier while Cassidy took to the escape road.
Both drivers rejoined at the back of the field, with Evans pitting for a new front wing before retiring three laps later due to suspension damage.
“They slowed up a lot more than I was expecting, and I reacted to it but then I locked the rears and once I locked the rears I just went into Nick,” said Evans, who had won Saturday’s Rome E-Prix.
“When I rode the wheel, it just exaggerated everything, it escalated the situation.
“Very minor thing and then, it just shot me over the top of him and took me out of the race, pretty much took him out of the race as well. Just a really shit situation.
“Obviously I’ve got to take it on the chin, and I’ve got to put my hands up but it’s not like I was doing anything weird or trying to do anything dirty. I’ve barely touched a car the whole year.
Source: Autosport