The paper investigated the contribution of project design practices on sustainability of telecommunication project with reference to IHS Rwanda Ltd. Specifically, it assessed the effect of scope, budget and risk design on sustainability of telecommunication project in IHS Rwanda Ltd. The study was guided by change, planning, and system theories. The study used a descriptive with both qualitative and quantitative approaches. This paper drew a sample of 285 respondents from 913 beneficiaries. The sampled population was selected randomly and purposively to distribute questionnaire and hold interviews. For quantitative data analysis, descriptive and inferential statistics were used while qualitative data analysis used content analysis. There was an increase in defining course of activities affect Sustainability of telecommunication. Sequencing activities did not affect sustainability of telecommunication. Estimation time of activities affects sustainability of telecommunication by beneficiaries. Results showed that holding independent variables constant for estimating costs, budgeting costs, providing basis for budget and resource plan to a constant zero, social sustainability would be 0.568, a unit added in constant cost estimation stimulate the social sustainability in grade lead to limited by a factor of 0.23. Findings revealed that holding independent variables constant identifying risks, analyzing qualitative, quantitative and response risks, identification to a zero constant, the social sustainability at 0.25 a unit change in risk identification can reduce environment sustainability limited by a factor of 0.97. The study recommends that project managers should stimulate cooperation between changes in abilities, social development for attaining program success must focus on management skills to align with risk design. Project team members and beneficiaries should be aware of design projects in an effective manner that is capable to facilitate project performance. The project scope should be used to determine project cost with WBS being linked to project plan. This research recommended development of time schedules, precise and achievable plan, an accurate sequencing of actions. The project team should apply a simple method in order to assess pertinent risks easily. The study suggests similar research in other countries and regions to reflect the reality across region. Such results would provide a guideline that may help establishing government policies. Keywords: Project Sustainability, Project Design Practices, Project Budget Design, Project Design Practices, Project Risk Design.