diff --git a/website/registrations/forms.py b/website/registrations/forms.py
index 6ab18780..4650f02f 100644
--- a/website/registrations/forms.py
+++ b/website/registrations/forms.py
@@ -35,6 +35,13 @@ def __init__(self, *args, **kwargs):
         self.fields["project3"].queryset = Project.objects.filter(
             semester=Semester.objects.get_first_semester_with_open_registration()
         )
+        self.warnings = []
+    
+    ignore_warnings = forms.BooleanField(
+        label="I acknowledge the warning(s) and want to proceed with the registration",
+        required=False,
+        initial=False,
+    )
 
     github_id = forms.IntegerField(disabled=True, label="GitHub ID")
     github_username = forms.CharField(disabled=True, label="GitHub Username")
@@ -280,4 +287,18 @@ def clean(self):
 
         if len(set(filter(None, (project1, project2, project3)))) != 3:
             raise ValidationError("You should fill in all preferences with unique values.")
+
+        available_slots = sum(
+            bool(cleaned_data.get(f"available_during_scheduled_timeslot_{i}"))
+            for i in range(1, 11)
+        )
+
+        if available_slots < 4 and not cleaned_data.get("available_during_scheduled_timeslot_10"):
+            warning = (
+                "You are only available for less than 4 scheduled timeslots and "
+                "not available for the last timeslot on Friday afternoon. "
+                "This may make scheduling difficult."
+            )
+            self.warnings.append(warning)
+
         return cleaned_data
diff --git a/website/registrations/templates/registrations/step-2.html b/website/registrations/templates/registrations/step-2.html
index a246d6b5..05452fb3 100644
--- a/website/registrations/templates/registrations/step-2.html
+++ b/website/registrations/templates/registrations/step-2.html
@@ -14,6 +14,16 @@ <h6>{{ registration_semester }}</h6>
         <hr>
         <form method="post" class="form">
             {% csrf_token %}
+
+            {% if form.warnings %}
+     
+                <p><small>Please check the box below to continue with registration</small></p>
+            {% else %}
+                <style>
+                    #id_ignore_warnings { display: none; }
+                    label[for="id_ignore_warnings"] { display: none; }
+                </style>
+            {% endif %}
             {% bootstrap_form form %}
             {% bootstrap_button "Submit" name="submit" value="submit" button_type="submit" button_class="btn-secondary" %}
         </form>
diff --git a/website/registrations/views.py b/website/registrations/views.py
index 360ee920..cabde903 100644
--- a/website/registrations/views.py
+++ b/website/registrations/views.py
@@ -81,6 +81,11 @@ def get_initial(self):
         return initial
 
     def form_valid(self, form):
+        """Check for warnings before registering."""
+        if form.warnings and not form.cleaned_data.get("ignore_warnings"):
+            form.add_error(None, form.warnings[0])
+            return self.form_invalid(form)
+        
         """Register new user if the form is valid."""
         with transaction.atomic():
             user, _ = User.objects.get_or_create(github_id=self.request.session["github_id"])
@@ -91,7 +96,6 @@ def form_valid(self, form):
             user.github_username = form.cleaned_data["github_username"]
             user.student_number = form.cleaned_data["student_number"]
             user.save()
-
             Registration.objects.create(
                 user=user,
                 semester=Semester.objects.get_first_semester_with_open_registration(),