Stark broadening is dorninant mechanism of broadening far spectral lines in high-density plasma. Collisions of ernitters and absorbers with electrically charged paiticles influence on spectral line profiles in plasma. Lines in spectra becorne broadened and shifted because of splitting and shifting the energy levels of atoms in electric field (Stark effect). This work focuses on research of stellar plasma, although the results can be used in a study of laborato1y plasma as well. Importance of Stark broadening of spectral lines for analysis, interpretation and synthesis of the star spectra, diagnostics, analysis and modeling of stellar plasma is considered in astrophysics as well, as the significance of these results for laborato1y research, e.g. fusion and technological plasma or laser physics. The aim is to determine the previously unknown Stark broadening parameters of the spectral lines of transition metals and lanthanides that do not exist in the literature yet, neither measured by laboratory rnethods nor theoretically detennined, for single electrically charged ions (Co II), double electrically charged ions (Lu III), and t r iple electrically charged ions (Zr IV), in order to study the impact ofline broadening on spectra ofhot stars and white dwarfs. The calculations are đone by using of modified semiernpirical method (MSE, Dimitrijević and Konjević, 1980), where mostly available atomic parameters of the electronic transitions causing spectral lines formation are used as input. The results were also used to check the property of regularity and systematic trend that had earlier observed in the previous Starlc width values, in order to detect new approximation methods of detem1ining the Stark broadening parameters in the case when conditions for use of any of known theoretical approaches ai·e not satisfied.