Mayor Bill de Blasio on Sunday suspended the March 24 special election for Queens Borough President.

The election to fill the vacancy was already underway, with early voting beginning last March 13.

Councilman Donovan Richards, the Queens Democratic Party-backed candidate who is considered the front-runner, had urged the mayor and Gov. Andrew Cuomo to postpone the election because of health concerns over the coronavirus.

Richards immediately praised de Blasio in a tweet moments after the mayor’s called off the race.

“Thank you@NYCMayor for recognizing the importance of protecting poll workers and voters in Queens. We should never put politics ahead of the health and safety of our most vulnerable,” Richards said.

De Blasio called the special election to fill the vacancy created after former Borough President Melinda Katz was elected the county’s district attorney, assuming her new role in January.

Sharon Lee, who was Katz’s deputy, is the acting Queens borough president.

The other candidates in the race include former top Queens prosecutor James Quinn — who is backed by the Republican and Conservative parties — Councilman Costa Constantinides, former Councilwoman Elizabeth Crowley and retired cop Anthony Miranda.

The action raises questions about whether New York will move ahead with the scheduled April 28 presidential primary.

Georgia officials announced Sunday that it had pushed back its March 24 presidential primary.

Louisiana also delayed its presidential primary.