Atishi Marlena, who was one of the prominent spokespersons of the party during the election campaign, was also dropped.
The removal of Yadav, Bhushan and Kumar came four days after they were expelled as National Executive members during the party’s National Council meeting after being accused of indulging in anti-party activities.
Bhushan was on Sunday removed as the chief of party’s disciplinary committee.
Bhushan and Yadav were sacked from the party’s Political Affairs Committee of the party on March 4.
New panel of spokespersons include Sanjay Singh, Kumar Vishwas, Ilyas Azmi and Pankaj Gupta, Ashutosh and Ashish Khetan, all known to be close to Kejriwal.
The other members of the panel are MLAs Saurabh Bharadwaj, Adarsh Shastri, Kapil Mishra and Alka Lamba and MP Bhagwant Mann in the panel.