This study investigates how national data sovereignty laws influence international                 e commerce, using comparative sectoral evidence from Asian and European economies. Drawing from an original panel dataset spanning 2015-2024, the research incorporates macroeconomic trade flows, ICT export and service data, and coded legal regimes governing data localization and cross border digital flows. Quantitative analysis demonstrates that stringent data sovereignty laws are significantly associated with reduced cross border e commerce activity, particularly in digital services and ICT enabled sectors. Qualitative case studies contextualize this impact by exploring regulatory pathways in China, India, Germany, and Sweden. The findings inform policy recommendations for harmonizing data governance frameworks with the principles of digital trade liberalization