Yes. If you PUT the disconnect endpoint for a device it will reset the cloud connection from the cloud side.
curl -X PUT https://api.particle.io/v1/devices/<deviceid>/disconnect?access_token=<token>
This should also work from the product endpoint using a product bearer token:
curl -X PUT https://api.particle.io/v1/products/<productid>/devices/<deviceid>/disconnect?access_token=<token>