diff --git a/CHANGELOG.md b/CHANGELOG.md
index 74d7b8f..f50b40c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@
 - Added bunch of new labels, and improved others.
 - Renamed `buildCaseStatement.sh` to `buildLabel.sh` and improved it a lot. It is a great start when figuring out how to create a new label for an app, or a piece of software. Look at the tutorials in our wiki.
 - Mosyle changed their app name from Business to Self-Service
+- Added option to not interrupt Do Not Disturb full screen apps like KeyNote or Zoom with `INTERRUPT_DND="no"`.
 
 ## v0.6 - 2021-07-14
 
diff --git a/fragments/functions.sh b/fragments/functions.sh
index ebf6e58..7725e80 100644
--- a/fragments/functions.sh
+++ b/fragments/functions.sh
@@ -616,4 +616,30 @@ finishing() {
     fi
 }
 
+# Detect if there is an app actively making a display sleep assertion, e.g.
+# KeyNote, PowerPoint, Zoom, or Webex.
+# See: https://developer.apple.com/documentation/iokit/iopmlib_h/iopmassertiontypes
+hasDisplaySleepAssertion() {
+    # Get the names of all apps with active display sleep assertions
+    local apps="$(/usr/bin/pmset -g assertions | /usr/bin/awk '/NoDisplaySleepAssertion | PreventUserIdleDisplaySleep/ && match($0,/\(.+\)/) && ! /coreaudiod/ {gsub(/^.*\(/,"",$0); gsub(/\).*$/,"",$0); print};')"
+
+    if [[ ! "${apps}" ]]; then
+        # No display sleep assertions detected
+        return 1
+    fi
+
+    # Create an array of apps that need to be ignored
+    local ignore_array=("${(@s/,/)IGNORE_DND_APPS}")
+
+    for app in ${(f)apps}; do
+        if (( ! ${ignore_array[(Ie)${app}]} )); then
+            # Relevant app with display sleep assertion detected
+            printlog "Display sleep assertion detected by ${app}."
+            return 0
+        fi
+    done
+
+    # No relevant display sleep assertion detected
+    return 1
+}
 
diff --git a/fragments/header.sh b/fragments/header.sh
index a845b98..0ede4db 100644
--- a/fragments/header.sh
+++ b/fragments/header.sh
@@ -102,6 +102,16 @@ REOPEN="yes"
 #  - no            App not reopened
 
 
+# Interrupt Do Not Disturb (DND) full screen apps
+INTERRUPT_DND="yes"
+# options:
+#  - yes           Script will run without checking for DND full screen apps.
+#  - no            Script will exit when an active DND full screen app is detected.
+
+# Comma separated list of app names to ignore when evaluating DND
+IGNORE_DND_APPS="firefox,Google Chrome,Safari,Microsoft Edge,Opera,Amphetamine,caffeinate"
+
+
 # NOTE: How labels work
 
 # Each workflow label needs to be listed in the case statement below.
diff --git a/fragments/main.sh b/fragments/main.sh
index dfba2c9..2127145 100644
--- a/fragments/main.sh
+++ b/fragments/main.sh
@@ -8,6 +8,13 @@ esac
 
 # MARK: application download and installation starts here
 
+if [[ ${INTERRUPT_DND} = "no" ]]; then
+    # Check if a fullscreen app is active
+    if hasDisplaySleepAssertion; then
+        cleanupAndExit 1 "active display sleep assertion detected, aborting"
+    fi
+fi
+
 printlog "BLOCKING_PROCESS_ACTION=${BLOCKING_PROCESS_ACTION}"
 printlog "NOTIFY=${NOTIFY}"