The problem might be as simple as the overhead conrete need to extend 1/2" farther out so water woudl drip off. You mgith be able to have a pieace of flashing custom bent ot fit on the lwoer edge of the concrete and stick out 1" with a rolled edge that curves down jsut a little. This acts the same as a drip edge on a roof gutter system. Actually you might be able ot use soem roofing drip edge. To adhere it, you might be able to use some silicone adhesive caulk.
But whatever you do, you need to stop water from running down that wall.
Previous home - 1968 single story Ranch/Colonial, 1200sqft - 11 windows
Current home - 1925 2 story Beaux Arts Neo-classical overlooking the Mississippi River, 3200sqft - 48 Windows