The lawyer, who joined the Law Society of Kenya protests last week over Ruto's attack on the Judiciary avers that the planned meeting between Koome and Ruto raises suspicion.
"The meeting not only undermines the independence of the Judiciary but also raises suspicion," he added.
The Wiper leader instead urged the President to refrain from the functions and matters of the Judiciary as it is an independent institution enshrined in the Constitution.
His remarks come a day after CJ Koome said that the Judiciary has written to President Ruto seeking to address concerns he raised against some judges.
In his response, while Speaking in Nandi County yesterday, the Head of State welcomed the move saying that dialogue will help end impunity, corruption, and vested interests.
"I am going to lead from the front in the conversation between the Executive and the Judiciary so that we can deal with the monster that is destroying our country and the corrupt who go to court," said Ruto.
Over the past few weeks, members of the Executive led by President Ruto have claimed that judges are engaging in corrupt activities, hence frustrating the Kenya Kwanza development agenda.
On Sunday, Deputy President Rigathi Gachagua said that he would file a petition to remove Justice Esther Maina over a graft case she handled in 2022.
His sentiments attracted criticism from various leaders including LSK President Eric Theuri who urged him to follow the legal procedures to address his grievances.
Reiterating his remarks, Kalonzo said: "The person holding the office of the Deputy President should act with decorum concerning matters affecting other State institutions, in this case, the Judiciary,", adding, "When I last checked, Gachagua was not a lawyer, neither does he have the powers to do that; publicly calling out a judge of the High Court. Further, a person of his level should have proper legal representation. I think his lawyers are failing him by not advising him on the avenues that are open for this kind of dialogue."
This is the first time Ruto's administration has been at war with the Judiciary since ascending power in 2022.