Banks III rose to NYPD chief of department before leaving in 2014. He was brought back by the mayor to serve as his deputy mayor.
"We spoke yesterday and we spoke again this morning and he stated he wants to move on to other things in his life," Adams told NY1. "I wish my good friend well."
Banks' brother, David Banks, resigned as schools chancellor. First Deputy Mayor Sheena Wright, David Banks' wife, is arranging her departure from the administration.
Although over the weekend Adams said, "She's with us. All of these rumors. When we make an announcement, we make an announcement. I don't know where all these rumors came from. But when we make our announcement, we make them. She's been an amazing First Deputy Mayor and we look forward to her to continue to do the great job that she does."
Phil Banks had his phones seized last month as part of a federal investigation into city contracts how the police department enforced nightlife regulations. David Banks and Sheena Wright had their phones seized as well.
An attorney for Banks said not to "read anything into his resignation."
"There is no indication that he a target, to the contrary, I was told he was not a target," attorney Ben Brafman said. "Don't read anything into his resignation."
Phil Banks, at one point the highest ranking uniformed officer in the NYPD, resigned from the department in 2014 amid a different corruption scandal during the prior administration. Federal prosecutors at the time named Banks an unindicted coconspirator.
Three more administration officials also announced they were departing on Monday:
-Winnie Greco, the mayor's liaison to the Chinese American community, whose home was searched by federal agents earlier this year.
-Rana Abbasova, the mayor's director of protocol for international affairs and served as his liaison to the Turkish community, who has been cooperating with federal investigators.
-Mohammed Bahi, who worked in the city's Community Affairs Unit.
Greco and Bahi resigned, and Abbasova was terminated. All three served as community liaisons for the administration.
Adams has pleaded not guilty to a five-count indictment charging him with bribery and fraud. He is resisting calls for his resignation
A Marist poll apparently shows that most city residents feel Adams should resign.
The poll found 69% of NYC residents believe the mayor should resign, including 71% of the Democrats. And 80% think he shouldn't run again for office while 30% say he should serve out the rest of his term. If the mayor does not resign, 63% said Gov. Kathy Hochul should begin the process of removing Adams from his position while 36% do not think Hochul should take these measures.
Adams said the poll numbers are a reflection of people only hearing "one side of the story and now it is going to be an opportunity to see both sides of the story."
"Listen, we have not fully be able to tell our side of the conversation," the mayor said before entering a Brooklyn church on Friday morning. "Once they see both sides of the issue, you are going to hear what I've stated over and over again, that I did nothing wrong."
Despite the poll results, Adams is continuing to try to convince New Yorkers that he is still capable of running the city despite the ongoing criminal trial and several high-profile members of his inner circle resigning.
(Some information from ABC News)
ALSO READ: Debate emerges over whether Eric Adams should resign as mayor of New York City
Politicians split on whether Mayor Adams should resign
----------
* Get Eyewitness News Delivered
* More New York City news
* Send us a news tip
* Download the abc7NY app for breaking news alerts
* Follow us on YouTube