[en] The production of the lightest and extremely weak-bound hypernucleus Λ3H in high-energy heavy-ion collisions is studied for two different mechanisms; (1) coalescence of deutron-fragment from peripheral collisions and Λ-hyperon, and (2) coalescence of Λ, neutron and proton all from central collisions. The respective cross sections are found comparable but with distinct rapidity distributions. (author)