Delinquency rates marginally improved for banks in the third quarter but no full recovery is imminent, according to a report from Trepp that shows bank shedding of troubled commercial real estate loans has slowed. Trepp's preliminary estimates — based on third-quarter earnings reports and call report filings — show that real estate and business loan delinquency results will indicate incremental improvement once all the reports are in. The data analytics firm said efforts to shed problem CRE loans may have slowed during the third quarter in response to the weaker economy. The total delinquency rate for commercial loans fell to an estimated 4.6%, down from 4.9% in the second quarter. The total delinquency rate on single-family, first-lien residential mortgages edged lower to a preliminary estimate of 12% during the third quarter, down from 12.3% in the second quarter and 13.1% a year ago. The rate for serious delinquencies in residential mortgages (nonaccrual rates) fell to 5%, flat with the fourth quarter of 2009. Trepp said the slow rate of improvement reflects the high volume of foreclosures and weak price trends still plaguing the housing market. Write to Kerry Curry. Follow her on Twitter @communicatorKLC.