Effective April 2nd, 2020 Microsoft Azure Spot virtual machines are generally available. Microsoft Azure Spot Virtual Machines let you access unused Azure compute capacity at large discounts compared to pay-as-you-go prices. These Microsoft Azure Spot Virtual Machines are evicted when Azure no longer has available compute capacity and must reallocate its resources. At that point, the virtual machine is deallocated, and no additional virtual machine-related changes are incurred, but other resources, such as disk or network, continue to run and accrue charges. Take advantage of Spot pricing for Azure Virtual Machines or Virtual Machine Scale Sets. Select the right deployment model based on your preferences and the characteristics of your application. Microsoft Azure Spot Virtual Machines are suitable to run workloads that do not need to be completed within a specific timeframe.
Please find the official announcement here: https://azure.microsoft.com/en-us/updates/azure-spot-virtual-machines-are-now-generally-available/.