Officials from the two countries signed the three documents after a meeting of high-ranking delegations in Bern, co-chaired by Iranian President Hassan Rouhani and his Swiss counterpart Alain Berset.
The two sides signed two statements on scientific and medical cooperation as well as an agreement on road transportation.
Heading a diplomatic and economic delegation, Rouhani has travelled to Switzerland for a tour that would also take him to Austria.
The trip comes after the US administration announced plans to get as many countries as possible down to zero Iranian oil imports and launch a campaign of “maximum economic and diplomatic pressure” on Iran.