You're encountering a resource stockout error from Azure, specifically for the Standard_DS3_v2 VM SKU in Central India. This means Azure doesn't currently have capacity for that VM size in that region or zone. More specifically:
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SkuNotAvailable: Azure has run out of available capacity for the selected VM size in your region. - You’re restricted to choosing between DS3v2, DS4v2, and DS5v2, but those are older-generation VMs (Dsv2-series), which Microsoft is gradually deprecating or not provisioning in some regions anymore.
Microsoft is encouraging users to move to newer VM SKUs like Dsv4, Dsv5, Dasv5, Ddv5, Esv5, etc. It seems your platform or service only lists DS3v2, DS4v2, DS5v2. If your current environment (like Azure ML or a cloud portal UI) only shows v2 SKUs, you likely need to update your configuration or request support to enable newer SKUs. You can try deploying to a nearby region such as South India, East Asia (Hong Kong), or Southeast Asia (Singapore), but note that VM availability can differ by region and zone, even within the same country. You can use the Azure CLI to check available SKUs in your region:
az vm list-skus --location centralindia --output table
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hth
Marcin