---
slug: "azure-functions-python-3-10-end-of-support"
title: "Azure Functions: Python 3.10 end of support"
summary: "End of support date for Python 3.10 on Azure Functions: 1 Oct 2026. Apps keep running after that date but stop receiving security updates, performance optimizations and customer service."
cloud: "azure"
service: "Azure Functions"
service_slug: "functions"
category: "runtime"
type: "end_of_support"
announced_date: "2026-01-28"
effective_date: "2026-10-01"
effective_precision: "day"
replacement: "Python 3.13"
affected_versions: ["3.10"]
source_url: "https://azure.microsoft.com/updates?id=545771"
extra_source_urls: ["https://learn.microsoft.com/azure/azure-functions/language-support-policy","https://learn.microsoft.com/azure/azure-functions/update-language-versions?tabs=azure-portal%2Clinux&pivots=programming-language-python#update-the-stack-configuration"]
vendor_ref: "545771"
last_checked_at: "2026-11-12T09:55:19.345Z"
created_at: "2026-11-13T13:36:44.208Z"
updated_at: "2026-11-13T13:36:44.208Z"
url: "https://eolwatch.dev/items/azure-functions-python-3-10-end-of-support"
short_url: "https://eolwatch.dev/i/1k"
markdown_url: "https://eolwatch.dev/items/azure-functions-python-3-10-end-of-support.md"
json_url: "https://eolwatch.dev/items/azure-functions-python-3-10-end-of-support.json"
---

# Azure Functions: Python 3.10 end of support

End of support date for Python 3.10 on Azure Functions: 1 Oct 2026. Apps keep running after that date but stop receiving security updates, performance optimizations and customer service.

- Effective date: 1 Oct 2026
- Cloud: [Azure](https://eolwatch.dev/cloud/azure.md)
- Service: [Azure Functions](https://eolwatch.dev/services/azure/functions.md)
- Type: End of support
- Category: [Runtime](https://eolwatch.dev/categories/runtimes.md)
- Affected versions: 3.10
- Replacement: Python 3.13
- Announced: 28 Jan 2026
- Official source: [azure.microsoft.com](https://azure.microsoft.com/updates?id=545771)
- Last checked: 12 Nov 2026

## What breaks

Support for Python 3.10 in Azure Functions ends on 1 Oct 2026, in alignment with the end of community support. Apps hosted on Functions continue to run, but security updates and performance optimizations are no longer available. Microsoft no longer provides customer service for Python 3.10.

## Who is affected

### Affected versions

- `3.10`

### Matching resource types

- `microsoft.web/sites`
- `azurerm_linux_function_app`

### Fields the check reads

- `linuxfxversion`
- `kind`
- `site_config.application_stack.python_version`

### Detected by the estate check from

- Azure Resource Graph export (CSV or JSON)
- Terraform state or plan (JSON)
- ARM template

## What to do

By the end of support date, upgrade function apps to Python 3.13 following the steps in [Update the stack configuration](https://learn.microsoft.com/azure/azure-functions/update-language-versions?tabs=azure-portal%2Clinux&pivots=programming-language-python#update-the-stack-configuration). The support policy is described in [Azure Functions stack version support](https://learn.microsoft.com/azure/azure-functions/language-support-policy).

## Replacement

Python 3.13

## Sources

- [Official source](https://azure.microsoft.com/updates?id=545771) (azure.microsoft.com, Official)
- [Additional source](https://learn.microsoft.com/azure/azure-functions/language-support-policy) (learn.microsoft.com, Official)
- [Additional source](https://learn.microsoft.com/azure/azure-functions/update-language-versions?tabs=azure-portal%2Clinux&pivots=programming-language-python#update-the-stack-configuration) (learn.microsoft.com, Official)

Last checked against the first source in this list on 12 Nov 2026.

Page: https://eolwatch.dev/items/azure-functions-python-3-10-end-of-support | JSON: https://eolwatch.dev/items/azure-functions-python-3-10-end-of-support.json

The text on this page is drafted with AI assistance from the vendor's text, checked against the official source and approved by a person before it is published.