The fire at Tampaco Foils Limited fire broke out on September 10 in Tongi.
The three bodies recovered on Monday were charred beyond recognition, the Dhaka Tribune quoted a senior police official as saying.
The reason behind the fire remains unclear as government officials claimed that the water boiler had not exploded and the fire originated from a gas leak.
The government had announced Taka 2 lakh as compensation to the deceased persons' families and Taka 1 lakh to those injured.
The factory employed around 450 workers, and some 75 persons were working when the incident took place. Many others were also critically injured in the fire
A fire at a plastics factory last year killed 13 persons, and in 2013 more than 1,100 people died in the Rana Plaza factory collapse, the worst industrial accident in the country.