Wietlin Trzeci [ˈvʲɛtlʲin ˈtʂɛt͡ɕi] is a village in the administrative district of Gmina Laszki, within Jarosław County, Subcarpathian Voivodeship, in south-eastern Poland. It lies approximately 4 kilometres (2 mi) south-west of Laszki, 14 km (9 mi) east of Jarosław, and 62 km (39 mi) east of the regional capital Rzeszów.