The outstanding diplomatic work of his Foreign Minister, Carlos Saavedra Lamas, was one of the greatest accomplishments of his administration, stained by constant accusations of corruption and of delivering the national economy into the hands of foreign interests, the British in particular, with whom his vice-president Julio A. Roca, Jr. had signed the Roca-Runciman Treaty.
Izvanredan diplomatski rad njegovog ministra vanjskih poslova, Carlosa Saavedre Lamas, bio je jedan od najvećih uspjeha njegove administracije, obojene stalnim optužbama za korupciju i isporuku nacionalnog gospodarstva u ruke stranih interesa, posebice britanskih, s kojima mu je dopredsjednik Julio A. Roca mlađi. je potpisao sporazum Roca-Runciman.