The motivation of the study is to gauge the asymmetric effects of remittances (R), gross capital formation (GCF), and FDI on financial development (FD) in Bangladesh, India, Pakistan, and Srilanka spanning the period 1978-2018. The study applied unit root tests, including DF-GLS and Zivot-Andrew, ARDL bound test, tBDM test, Bayer and Hanck combined cointegration test, nonlinear ARDL (NARDL) for asymmetry, and, finally, directional causal effects evaluated with the Toda-Yamamoto causality test. ARDL bound testing documents the long-run association between R, GCF, FDI, and FD, valid for sample countries. Additionally, remittance elasticity exposes a positive, statistically significant linkage with financial development in the long run and short run. The standard Wald test reveals that the test statistics are statistically significant at 1% level, suggesting the asymmetric association between financial development and explanatory variables. The asymmetric association is valid both in the long-run and short-run. With the asymmetric effects of remittances, positive and negative shocks expose positive, statistically significant at a 1% level both in the long-run and short-run. However, in coefficient elasticities, harmful innovations are more critical to financial development than positive innovations in remittances. It suggests that policymakers have to make efforts to formulate policies that induce the migrants to send remittances to the economy. Finally, the directional causality test results disclosed unidirectional causality running from remittances to financial development.