Is part time phd available at iisc?

Yes, a part-time PhD is offered by the IISc. However, you can get admission only through an external registration program. Your current organization must give you leave for one year so that you are physically present at the institute. After one year you can go back to your organization. This can be a challenging process and no organization gives leave for such a long duration. 

Instead of going for an IISC part-time PhD, you can consider for Online DBA Doctorate. The program is offered completely in online mode by top-tier foreign mode. You will not be asked to visit the university campus for any purpose. You can complete this doctorate within 36 months. Moreover, you can prefix your name with the reputed “Dr” title.