India's BSE Sensex closed about 0.3% down at 82,253.5 on Monday, hitting a fresh three-week low and extending losses for a fourth consecutive session. The decline came amid renewed tariff fears after US President Donald Trump threatened to impose 30% tariffs on imports from Mexico and the EU, effective August 1, despite prolonged negotiations. Concerns over weak IT earnings and foreign capital outflows also weighed on investor sentiment. With TCS reporting underwhelming results last week, caution prevailed ahead of upcoming reports from HCL Technologies and Tech Mahindra this week. Traders also awaited Indian June inflation data for insights into RBI's policy direction. Sector-wise, IT stocks stayed under pressure, and profit-taking hit banks and financials. However, gains in realty, pharmaceuticals, and energy helped offset broader losses.