diff --git a/meshroom/core/attribute.py b/meshroom/core/attribute.py
index f8135323..5274d3cf 100644
--- a/meshroom/core/attribute.py
+++ b/meshroom/core/attribute.py
@@ -339,9 +339,12 @@ class Attribute(BaseObject):
         elif self.isInput and Attribute.isLinkExpression(v):
             # value is a link to another attribute
             link = v[1:-1]
-            linkNode, linkAttr = link.split('.')
+            linkNodeName, linkAttrName = link.split('.')
             try:
-                g.addEdge(g.node(linkNode).attribute(linkAttr), self)
+                node = g.node(linkNodeName)
+                if not node:
+                    raise KeyError(f"Node '{linkNodeName}' not found")
+                g.addEdge(node.attribute(linkAttrName), self)
             except KeyError as err:
                 logging.warning('Connect Attribute from Expression failed.')
                 logging.warning('Expression: "{exp}"\nError: "{err}".'.format(exp=v, err=err))
diff --git a/tests/test_graphIO.py b/tests/test_graphIO.py
index cd51038c..95d72021 100644
--- a/tests/test_graphIO.py
+++ b/tests/test_graphIO.py
@@ -336,3 +336,15 @@ class TestImportGraphContentFromMinimalGraphData:
             assert len(graph.nodes) == 1
             assert len(graph.compatibilityNodes) == 0
 
+    def test_connectionsToMissingNodesAreDiscarded(self):
+        graph = Graph("")
+
+        with registeredNodeTypes([SimpleNode]):
+            sampleGraphContent = dedent("""
+            {
+                "SimpleNode_1": { 
+                    "nodeType": "SimpleNode", "inputs": { "input": "{NotSerializedNode.output}" } 
+                }
+            }
+            """)
+            graph._deserialize(json.loads(sampleGraphContent))