diff --git a/internal/terraform/node_action_validate.go b/internal/terraform/node_action_validate.go
index 4ad63a7254..f9c67b519e 100644
--- a/internal/terraform/node_action_validate.go
+++ b/internal/terraform/node_action_validate.go
@@ -82,6 +82,27 @@ func (n *NodeValidatableAction) Execute(ctx EvalContext, _ walkOperation) tfdiag
 		return diags
 	}
 
+	// We currently only support unlinked actions, so we send a diagnostic for other types
+	if n.Schema.Lifecycle != nil {
+		diags = diags.Append(&hcl.Diagnostic{
+			Severity: hcl.DiagError,
+			Summary:  "Lifecycle actions are not supported",
+			Detail:   "This version of Terraform does not support lifecycle actions",
+			Subject:  n.Config.DeclRange.Ptr(),
+		})
+		return diags
+	}
+
+	if n.Schema.Linked != nil {
+		diags = diags.Append(&hcl.Diagnostic{
+			Severity: hcl.DiagError,
+			Summary:  "Linked actions are not supported",
+			Detail:   "This version of Terraform does not support linked actions",
+			Subject:  n.Config.DeclRange.Ptr(),
+		})
+		return diags
+	}
+
 	var configVal cty.Value
 	var valDiags tfdiags.Diagnostics
 	if n.Config.Config != nil {