Faɗuwar ruwan Rusumo (Faransanci: Chutes Rusumo) shi ne ruwan da yake kan kogin Kagera a kan iyakar Rwanda da Tanzania, wani ɓangare na mafi nisa daga cikin kogin Nilu. Faduwar ta kusan tsayi 15 m (49 ft) kuma 40 m (130 ft) fadi kuma sun kafa a kan precambrian schists da quartz-phyllites. Kodayake faduwar da kansu ba ta da wani tsayi mai girma idan aka kwatanta da sauran magudanan ruwa, amma sun taka muhimmiyar rawa a tarihin Ruwanda saboda ita ce kawai hanyar da ta dace a kan kogin da ke yankin. Rashin faduwar shine wurin da Bature ya fara zuwa Ruwanda a shekarar 1894, lokacin da lissafin Jamusawa Gustav Adolf von Götzen ya tsallaka daga Tanzaniya (ana ɗaukar Rwanda a matsayin ɓangare na Afirka ta Gabas tun daga 1885 amma har yanzu babu wani Bajamushe da ya shigo ƙasar). Ya ci gaba daga nan zuwa fadar Mwami da ke Nyanza, kuma ya wuce zuwa gabar Tafkin Kivu. 'Yan Beljiyam kuma sun shiga Ruwanda ta hanyar faduwa, lokacin da suka mamaye kasar a lokacin yakin duniya na 1 a shekarar 1916.