[en] The high-spin states of ¹⁴³Nd have been studied in ¹³⁰Te(¹⁸O, 5n) reaction at a beam energy of 80 MeV. Based on delayed γ-γ coincidence, γ ray angular distribution, and γ ray linear polarization measurements, a high-spin isomer in ¹⁴³Nd was identified for the first time with a measured half-life of (35 +- 8) ns and J^π = 49/2⁺. The characteristic of the high-spin isomer in ¹⁴³Nd was stressed with a deformed independent particle model. The model assigned a stretched configuration of [ν(f_7/2h_9/2i_13/2)π(h_11/2²)] to the 49/2⁺ isomer in ¹⁴³Nd As the isomers in the N = 83 heavier isotones, the occurrence of the 49/2⁺ isomer in ¹⁴³Nd can be interpreted to be caused by the sudden change in nuclear shape along the yrast line