Below doc has few suggestions. Please check if that helps:
Troubleshoot allocation failures when you create, restart, or resize VMs in Azure
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On Friday, my VM in West India would not start due to lack of capacity in the region. I kept trying for 12 hours, and finally it did start during the night in India when more resources were available.
How should I resolve so this does not occur again?
In other words, should I move it to a different region with more available capacity? There is East and Central India but I don't know if those too are nearing peak load.
The specific region is not really important - it's just used by an Indian developer so the biggest issues is just not wanting the VM to be unavailable.
Below doc has few suggestions. Please check if that helps:
Troubleshoot allocation failures when you create, restart, or resize VMs in Azure