Hi Deepak,
In order to satisfy your requirement, check your availability check option in combination with Rule - B (SD Delivery).
In this see if the 'Check without RLT' field is ticked marked, if it is then remove that check box and try to test scenario.
In this case system will allow you to create delivery but it will stop you at picking and PGI steps.
Please try with above mentioned points and let us know the results here.
Thanks
Regards,
Praveen Bodduna