This　article　presents　a　Ka-band　fourth-order　slotted　spherical　resonator　waveguide　bandpass　filter　(BPF)　with　a　wide　spurious　suppression　stopband.　It　uses　the　first　higher-order　TM211　mode　rather　than　the　fundamental　TM101　mode　of　the　spherical　resonator　in　order　to　obtain　a　higher　unload　quality　factor　(Q(u))　for　smaller　in-band　insertion　loss,　as　well　as　a　larger　filter　volume　that　gives　better　tolerance　to　fabrication　errors　in　high　frequency　applications.　By　introducing　slots　that　interrupt　surface　currents,　the　fundamental　TM101　and　two　higher　spurious　modes　(TE101　and　TM311)　can　be　suppressed　without　compromising　the　unloaded　quality　factor　of　the　TM211　mode.　In　addition,　the　filter　topology　is　optimized　to　further　enhance　the　suppression　level　of　the　spurious　passbands.　A　Z-shaped　topology　has　been　found　effective　in　decreasing　the　coupling　strength　of　the　spurious　TM311　mode.　An　analysis　is　performed　to　demonstrate　the　better　tolerance　of　the　Z-shaped　filter　over　the　conventional　TM101-mode　spherical　resonator　filter.　For　verification,　a　fourth-order　slotted　spherical　resonator　waveguide　BPF　with　a　center　frequency　of　31　GHz　and　bandwidth　of　880　MHz　is　designed　and　manufactured　using　a　selective　laser　melting　(SLM)　3-D　printing　process.　The　measured　results　show　an　average　in-band　insertion　loss　of　1.53　dB,　and　a　passband　return　loss　better　than　13.6　dB.　The　stopband　of　the　filter　is　extended　up　to　40.9　GHz　with　a　rejection　level　greater　than　20　dB.