Haut-Rhin's 3rd Constituency covers the southern portion of the département centred on the town of Altkirch however the largest town by far with the constituency is Saint-Louis, which lies close to Basel on the border with Switzerland.

The constituency includes the area historically known as Sundgau.

The constituency has elected Gaullist candidates for its entire history within the Fifth Republic.

The constituency was held by Jean-Luc Reitzer from 1988 until he stood down in 2022.

[3] * Striby stood as a dissident LREM member, without the support of the party or the Ensemble Citoyens coalition.