diff --git a/CHANGELOG.md b/CHANGELOG.md
index 60e666c3..3231b7ec 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,7 @@
 # NEXT_RELEASE
 
-* Remove "Biology/Fish/Arctic Char" layer
+* QGreenland Custom is no longer supported.
+* Remove "Biology/Fish/Arctic Char" layer.
 
 
 # v3.0.0alpha3 (2023-07-05)
diff --git a/doc/contributor-how-to/how-to-dev-plugin.md b/doc/contributor-how-to/how-to-dev-plugin.md
deleted file mode 100644
index a291e79a..00000000
--- a/doc/contributor-how-to/how-to-dev-plugin.md
+++ /dev/null
@@ -1,47 +0,0 @@
-# How to install QGreenland Custom as a developer
-
-QGreenland Custom is a QGIS plugin for downloading a custom set of data, including data which 
-is not part of the QGreenland Core zip package. This how-to guide walks through how to install the plugin as a developer.
-
-First, clone the QGreenland Custom repo from Faunalia:
-
-```
-git clone https://github.com/faunalia/qgreenland-plugin.git
-```
-
-Use the QGIS GUI to locate the QGreenland Custom directory by going to
-**Settings -> User Profiles -> Open Active Profile Folder**.
-Then, navigate to the /.python/plugins directory, echo $PWD and copy the full filepath. 
-
-Next symlink the plugin repo to the plugin directory using the filepath from the previous step:
-```
-ln -s $PWD '/filepath'
-```
-## Installing and reloading QGreenland Custom
-
-To begin installing QGreenland Custom, access the **Plugin** tab 
-in the top **Menu Bar**, and select **Manage and Install Plugins**. 
-
-![menu_bar](/_images/menu_bar.png)
-
-Navigate to the **Installed** tab in the **Plugin** window, and check the box for QGreenland Custom. 
-
-Instead of restarting QGIS after installing QGreenland Custom, 
-install the plugin, **Plugin Reloader**. **Plugin Reloader** will allow you to immediately
-see your changes instead of needing to restart QGIS. You can do this by navigating to 
-**Plugin -> Manage and Install Plugins**, then searching for **Plugin Reloader** in the
-search bar. Install the plugin then press OK.
-
-To use the plugin, navigate to the **Menu Bar** and select **Plugins -> Plugin Reloader -> Configure**.
-Select **qgreenland-plugin** in the drop down. Uncheck the **run the commands below before reloading** option. Leave the display option checked, and press OK.
-
-![configure_plugin](/_images/configure_plugin.png)
-
-Navigate to **Plugins -> Plugin Reloader -> Reload Plugin: qgreenland-plugin**.
-
-![reload_plugin](/_images/reload_plugin.png)
-
-You should receive a message notifying you that the plugin has been reloaded.
-
-After reloading the plugin, you are all set to begin using QGreenland Custom. Reference the user guide,
-**How to install and use QGreenland Custom**, to get started.
diff --git a/doc/reference/glossary/user-glossary.md b/doc/reference/glossary/user-glossary.md
index d6af83fd..832f8cd4 100644
--- a/doc/reference/glossary/user-glossary.md
+++ b/doc/reference/glossary/user-glossary.md
@@ -11,6 +11,10 @@ disciplines within a reasonable file size.
 
 ## QGreenland Custom
 
+```{attention}
+QGreenland Custom is no longer supported.
+```
+
 QGreenland Custom is a QGIS plugin that enables users to download and use only
 the QGreenland layers they are interested in.
 
diff --git a/doc/tutorials/plugin-how-to.md b/doc/tutorials/plugin-how-to.md
index ac865f6b..51169f14 100644
--- a/doc/tutorials/plugin-how-to.md
+++ b/doc/tutorials/plugin-how-to.md
@@ -1,5 +1,9 @@
 # Install and use QGreenland Custom
 
+```{attention}
+QGreenland Custom is no longer supported.
+```
+
 For a full tutorial on how to install and use the QGreenland QGIS plugin, 
 QGreenland Custom, visit the QGreenland Custom documentation 
 [here](https://qgreenland-plugin.readthedocs.io/en/latest/user-how-to/plugin-how-to.html).
diff --git a/doc/user-how-to/metadata.md b/doc/user-how-to/metadata.md
index 32d33d31..fec9b554 100644
--- a/doc/user-how-to/metadata.md
+++ b/doc/user-how-to/metadata.md
@@ -27,6 +27,10 @@ that is associate with the data layer, including but not limited to title and ab
 
 ## Using the QGreenland Custom plugin
 
+```{attention}
+QGreenland Custom is no longer supported.
+```
+
 If you have the QGreenland Custom QGIS plugin, you can access QGreenland layer metadata through the plugin.
 First you will need download the layer of interest if you do not already have it downloaded. If you need help installing or downloading data using QGreenland Custom, please follow 
 [this how-to guide](https://qgreenland-plugin.readthedocs.io/en/latest/user-how-to/plugin-how-to.html) first. 
diff --git a/doc/what_is_qgr.md b/doc/what_is_qgr.md
index 733f51c2..40b023e1 100644
--- a/doc/what_is_qgr.md
+++ b/doc/what_is_qgr.md
@@ -15,6 +15,11 @@ delivered in two ways:
    (for example, due to filesize constraints). QGreenland Custom has its own
    [documentation](https://qgreenland-plugin.readthedocs.io).
 
+   ```{attention}
+   QGreenland Custom is no longer supported.
+   ```
+
+
 Return to [QGreenland website](https://qgreenland.org)
 
 # What QGreenland *is not*