In this study conducted in 2019 in Bursa conditions, the effects of cutting irrigation water 4 (S1), 8 (S2), 12 (S3) and 16 (S4) days before harvest on tomato yield and quality were investigated in this study conducted on tomato paste Heinz-1015 variety. The experiment was carried out in 3 replications according to the randomized complete block design. The amount of seasonal irrigation water applied to the experimental treatments varied between 317 - 377 mm, the highest evapotranspiration (ET) was determined from S1 with 512 mm and the lowest ET was determined from S4 with 474 mm. The highest yield values were realized in S1 and S2 and the yield values decreased as the last irrigation was cut before harvest increased. The water productivity and irrigation water productivity values of tomatoes varied between 13.1-21.6 kg m^-3 and 19.6-30.3 kg m^-3, respectively, the highest values were determined in S2 and the lowest in S4 treatment. The highest Brix value in tomato fruits was measured at S4 with 6.53 and it was determined that Brix values decreased as irrigation was done close to harvest. The highest fruit hardness values were 1.13 kg and 0.99 kg from S4 and S3 treatments, respectively. L, a, b, C and h values for fruit color parameters were found to vary between 36.93-37.60, 36.37-38.40, 25.73-26.90, 44.33-46.30, 33.93-36.00, respectively. It is concluded that processing tomato is sensitive to the amount of irrigation water and time of cessation of irrigation before harvest, and if the last irrigation application is cut eight days before harvest, it leads to an improvement in quality parameters without a significant decrease in yield.