Hi , Firstly, I deployed vm on Azure using pulumi, later deleted vm manually. So in this case deletion resources manually and run the Pulumi script for deploy the resources not working? Any help appriciated! Thank you

Could you describe the steps you've taken and what you expected and what exactly isn't working?

If you delete something out of state then yes pulumi is going to have an issue because it cant find the resources you are wanting to delete when it calls the APIs