This research focuses on fabricating a nylon honeycomb structured 3D filter for grey wastewater treatment using analytical fused filament fabrication (AFF) and evaluating its water treatment performance. The honeycomb module offered a tortuous pathway for particulate deposition during dead-end and depth filtration. A TiO2 nanoparticle coating was applied to the filter surface via spin coating to enhance clogging effects. A preliminary simulation setup was also incorporated as an initial study of model complexity through iterations analysis. SEM analysis visualized particulate accumulation within the 3D honeycomb pores and layered fibrous structure. FTIR confirmed uniform TiO2 nanoparticle deposition, the filter was also subjected to EDX analysis, which showed a valid change in compounds on the surface of the honeycomb membrane for both depth and dead-end techniques. Water quality parameters (BOD, COD, UV-Vis) and treatment efficiency were evaluated. The results of the UV-vis investigation demonstrated the filter’s ability to marginally remove contaminants from grey wastewater in the dead-end and depth filtrate water compared to initial greywater, confirmed by BOD and COD results. TiO2 nanoparticles promoted faster clogging kinetics. However, filtration efficiency was decently improved and further optimization is the new field of research.