According to the local government officials, the three aid workers were shot dead by the militants after their vehicle was stopped in Sheikh Ali district.
The district administrative chief Noor Aqa Sami has confirmed that the three aid workers were serving with the Focus Humanitarian Assistance.
He said the victims included two men and a woman who were deployed to Sheikh Ali district for humanitarian assistance project.
Sami further added that the militants managed to flee the area after opening fire on the aid workers.
No group including the Taliban militants has so far claimed responsibility behind the incident so far but the local officials are blaming Taliban group for the incident.
Parwan is among the relatively volatile provinces in northern Afghanistan where anti-government armed militant groups are actively operating and frequently carry out insurgency activities.