Here we summarize the basic data used in the article: Gatti, G., Gosálbez-Martínez, D., Roth, S. et al. Hidden bulk and surface effects in the spin polarization of the nodal-line semimetal ZrSiTe. Commun Phys 4, 54 (2021). https://doi.org/10.1038/s42005-021-00555-x This folder contains the data obtained in ARPES experiments and the input/output files of Quantum ESPRESSO calculations. The data is distributed as follows: - Calculation: * Bulk: Input/output files of calculations in Quantum Espresso with and without Spin-orbit coupling of bulk ZrSiTe. * Slab: Input/output files of calculations in Quantum Espresso with Spin-orbit coupling for a slab of ZrSiTe. * Pseudopotentials: Set of pseudopotentials used in the Quantum Espresso calculations. - Experimental data: * Fig3: Experimental data shown in figure 3 of the aforementioned article. * Fig5: Experimental data shown in figure 5 of the aforementioned article. * Fig6: Experimental data shown in figure 6 of the aforementioned article.