SHowever, SMEs in contemporary times are facing several challenges such as negative individual characteristics of owner/managers, low patronage, and maintenance of a coordinated workforce. This cross sectional study examines the effect of workplace deviant behaviour sub variables on SMEs sustainability components among 365 owner/managers, supervisors, and employees of SMEs in the liquefied petroleum gas sub sector in Lagos State.Stratified proportionate sampling was utilized to select the respondents. Findings revealed that workplace deviant behaviour sub-variables had a positive 2 and significant effect on SMEs sustainability (Adj. R =.310, F(1, 369) = 166.967, p < 0 xss=removed> 0.05). The study concluded that workplace deviant behaviour sub-variables such as abusive supervision, workplace ostracism, workplace bullying, whistle blowing, and workplace incivility affected SMEs sustainability. The study recommended that SMEs owner/managers should modify the behaviour of their employees by inculcating motivational initiatives and organizational justice in managing the businesses. Also, owner/managers should create social networking opportunities for employees through social support, effective communication among stakeholders, and exemplary leadership.