Various lasers have been used for the treatment of erythematotelangiectatic rosacea (ETR), facial erythema (FE), and facial telangiectasias (FT). The assessment of the treatments of all of these conditions with a 577-nm pro-yellow laser has not been reported yet. The aim of this work was to assess the efficacy and safety of the 577-nm pro-yellow laser in ETR, FE, and FT. Forty patients suffering from ETR, FE, and FT (25 female and 15 male) were enrolled in this study. All of the patients were treated with 577-nm pro-yellow laser (QuadroStarPRO YELLOW (R) Asclepion Laser Technologies, Germany) at 4-week intervals, for one to four sessions. The assessment of the treatment was made based on the digital photographs and the percentage of fading of the erythema and telangiectasias in the lesions. Significant clinical improvement (80-100%) was observed in the first or second sessions of the treatment in FE and ETR patients and in second and fourth sessions of the treatment in FT patients. The treatment was very well tolerated. No side effect was observed except for a few patients who had mild to moderate erythema fading away in 12-24h. This case series has shown that the pro-yellow laser is a very effective, safe, and well-tolerated treatment for ETR, FE, and FT.