diff --git a/source/more-info/unsupported/system_architecture.markdown b/source/more-info/unsupported/system_architecture.markdown
new file mode 100644
index 000000000000..6448229c0fb6
--- /dev/null
+++ b/source/more-info/unsupported/system_architecture.markdown
@@ -0,0 +1,25 @@
+---
+title: "System architecture"
+description: "More information on why System Architecture marks the installation as unsupported."
+---
+
+## The issue
+
+Supervisor considers `i386`, `armhf` and `armv7` (all 32-bit system architectures)
+as unsupported. Home Assistant announced sunset of these architectures in May 2025
+(see [this blog post for more information](https://www.home-assistant.io/blog/2025/05/22/deprecating-core-and-supervised-installation-methods-and-32-bit-systems/)).
+On these system architectures Supervisor stops refreshing its update
+information. This means you will no longer receive updates for any component,
+including Home Assistant Core or Add-on updates.
+
+## The solution
+
+You'll be able to continue to use the system as is, but we recommend to move your
+Home Assistant installation onto supported hardware. This makes sure that you'll
+continue to receive software updates, including security updates.
+
+To migrate to a supported architecture, [create a full backup](/common-tasks/general/#backups)
+and download it. Install Home Assistant OS on supported 64-bit hardware. Use the
+[restore from backup feature during on-boarding](https://www.home-assistant.io/getting-started/onboarding/) (Option 2).
+If you use a Raspberry Pi 3 or Raspberry Pi 4, you can install the 64-bit variants
+of Home Assistant OS. See the [Raspberry Pi installation documentation](https://www.home-assistant.io/installation/raspberrypi/) for detailed instructions.