The TL-III project builds directly upon the outputs and momentum of the Foundation (BMGF) funded Tropical Legumes I and Tropical Legumes II (TL-I and TL-II) projects, but is strategically focused on fewer crops (does not include soybean and pigeonpea as was in TL-II) and fewer geographies (the seven BMGF African focus geographies-Burkina Faso, Ghana, Mali, Nigeria, Ethiopia, Tanzania and Uganda; and the Indian State of Uttar Pradesh).

The project has completed two phases (Phase I: 2007/8-2010; Phase II: 2010/11-2013); covered fifteen countries (India, Bangladesh, Ethiopia, Uganda, Tanzania, Kenya, Malawi, Mozambique, Zimbabwe, Burkina Faso, Ghana, Senegal, Nigeria, Niger and Mali) and six crops (chickpea, groundnut, cowpea, soybean, pigeonpea and common bean).