An 83-year-old Brooklyn grandma accosted by a would-be mugger who met his end when he tripped onto a subway station’s third-rail during his getaway refused Sunday to speak ill of her assailant.

“He is with the Lord already, and I am OK,” Carmen Fontanes told The Post.

The petite octogenarian was on her way to meet her girlfriends at a McDonald’s near her Park Slope home Saturday evening when the creep blindsided her.

“He grabbed me from behind and pushed me, and I fell,” Fontanes said of the thug, whom police still hadn’t identified as of Sunday. “I didn’t want to hit my face, so I held my pocketbook under my face.”

The pair wrestled over Fontanes’ iridescent blue purse near the corner of Fifth Avenue and Ninth Street, but the feisty granny refused to give up her bag — even though, by her estimate, the crook was in his 20s.

“I did not let go when he pulled,” Fontanes said.

During the struggle, a trio of good Samaritans started yelling at the would-be purse-snatcher and called 911.

“The two guys and the girl on the street, they really helped me,” Fontanes said. “I was on the floor and they were yelling, ‘Leave her alone!’”

Spooked, the suspect ran off in the direction of Fontanes’ church, St. Thomas Aquinas — where, she said, he tried in vain to mug a younger woman.

But by that time, the cops called by the good Samaritans had arrived to help Fontanes and spotted the commotion down the street.

“Outside the church, he grabbed another girl’s bag and he saw the cops coming and he ran into the subway,” Fontanes recalled.

With the cops on his tail into the Ninth Street station on the R line, the suspect tried to give them the slip by hopping onto the northbound tracks, police sources said.

He made it about ten blocks, nearly to the Union Street station, when he stumbled and fell onto the third-rail, electrocuting himself, sources said.

Fontanes scratched her left elbow when she was pushed to the ground, but refused to go to the hospital.

The scrappy grandma said she was troubled that the mugging happened around 7 p.m. when “it was still light out,” but said she wasn’t scared off of living in Brooklyn.

“I’ve lived here for 57 years and this is the first time anything like this happened,” she said.