Lamb　wave　scattering　from　a　crack　originating　at　a　through-hole　is　of　practical　importance　because　of　the　abundance　of　fastener　holes　used　in　engineering　structures.　Notches　are　often　used　to　simulate　cracks　so　that　Lamb　wave　methods　can　be　more　conveniently　investigated　in　the　laboratory.　A　linear,　three-dimensional　finite　element　model　is　employed　in　this　paper　to　study　incremental　scattering　of　the　fundamental　anti-symmetric　(A(0))　Lamb　wave　mode　from　notches　emanating　from　through-holes.　The　term　＂incremental　scattering＂　refers　to　the　change　in　scattering　caused　by　introduction　of　the　notch　and　is　motivated　by　structural　health　monitoring　for　which　transducers　are　fixed　and　signal　changes　are　interpreted　to　detect　damage.　Far-field　angular　scattering　patterns　are　generated　for　multiple　incident　angles　and　frequencies,　and　such　patterns　are　experimentally　validated　at　one　frequency　by　laser　vibrometry　measurements.　Comparisons　are　made　between　a　vertical　notch　alone　(no　hole)　and　notches　located　above　and　below　the　through-hole.　Additionally,　holes　of　different　sizes　are　considered　to　investigate　the　effect　of　hole　diameter　on　incremental　scattering　patterns.　Results　show　that　the　presence,　location　and　size　of　the　through-hole　affect　both　the　shape　and　strength　of　notch　incremental　scattering　patterns.