In this study, we utilized both ground‐based and space‐borne observations including total electron content (TEC) from GPS satellites. We investigate in detail variations of ionospheric Total Electron Content (TEC) and Ionospheric Scintillation Index S4 during the annular Solar eclipse that occurred on 21st June 2020 over selected sites. We choose six stations MTAL, KIT3, and MADK in Uzbekistan, and JFNG, LHAZ, and BJFS in China which are located close to the path of the Solar eclipse with obscuration $52%$, $57%$, $58%$, and $92%$, $94%$ and $95%$, respectively. The Ionospheric parameters as TEC and S4 index have been analyzed for continuous three days from 20th to 22nd June 2020. A significant amount of depletion in TEC of the order of 10-30 $%$ has been observed concerning the solar eclipse day. The results of the performed analysis indicate that the TEC level and S4 scintillation index were decreased during the solar eclipse due to the contraction of ionizing radiation.