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Exhibit (s)
MONTHLY CERTIFICATEHOLDERS' STATEMENT
DISCOVER CARD MASTER TRUST I
Series 2003-1, Subseries 3 Monthly Statement
Class A Certificate CUSIP # 25466KEL9
Class B Certificate CUSIP # 25466KEM7
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<S> <C>
Distribution Date: April 15, 2005 Month Ending: March 31,
2005
Pursuant to the Series Supplement dated as of January 22,
2003,
as amended, relating to the Amended and Restated Pooling and
Servicing Agreement dated as of November 3, 2004 by and
between Discover Bank and U.S. Bank National Association,
as Trustee, the Trustee is required to prepare certain
information each month regarding current distributions to
investors and the performance of the Trust. We have set
forth below this information for the Distribution Date
listed
above, as well as for the calendar month ended on the date
listed above.
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1.Payments to investors in Series 2003-1, Subseries 3 on this
Distribution
Date (per $1000 of Class Initial Investor Interest)
Series 2003-1, Subseries 3 Total Interest Principal
<S> <C> <C> <C> <C>
Class A 31 days at 2.9500000% $2.540277780 $2.540277780
$0.000000000
Class B 31 days at 3.2900000% $2.833055556 $2.833055556
$0.000000000
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<CAPTION>
2.Principal Receivables at the end of March, 2005
<S> <C>
(a) Aggregate Investor Interest $27,023,146,000.00
Seller Interest $5,185,013,069.53
Total Master Trust $32,208,159,069.53
(b) Group One Investor Interest $27,023,146,000.00
(c) Group One Investor Interest for
Interchange Series $4,736,844,000.00
(d) Series 2003-1, Subseries 3 Investor Interest
$526,316,000.00
(e) Class A Investor Interest $500,000,000.00
Class B Investor Interest $26,316,000.00
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<CAPTION>
3.Allocation of Receivables and other amounts collected
during March, 2005
Finance Charge Principal
Collections Collections Interchange
<S> <C> <C> <C>
(a) Allocation between Investors and Seller:
Aggregate Investor Allocation$369,782,822.51 $5,327,415,053.21
$11,533,830.32
Seller Allocation $78,043,065.25 $1,124,356,718.42
$68,268,496.61
(b) Group One Allocation $369,782,822.51 $5,327,415,053.21
$11,533,830.32
(c) Series 2003-1, Subseries 3 $7,191,635.93 $103,609,002.88
$0.00
(d) Class A Allocation $6,832,031.74 $98,428,230.15 $0.00
Class B Allocation $359,604.19 $5,180,772.73 $0.00
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<S> <C>
(e) Principal Collections as a monthly percentage of Master
Trust Receivables at the beginning of March, 2005 19.44%
(f) Finance Charge Collections as a monthly percentage of
Master
Trust Receivables at the beginning of March, 2005 1.35%
(g) Total Collections as a monthly percentage of Master
Trust Receivables at the beginning of March, 2005 20.79%
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4. Information Concerning the Series Principal Funding Account
("SPFA")
Deposits into the Deficit Amount
SPFA on this on this SPFA Investment
Distribution Date Distribution Date Balance Income
<S> <C> <C> <C> <C>
Series 2003-1, $0.00 $0.00 $0.00 $0.00
Subseries 3
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<CAPTION>
5. Information Concerning Amount of Controlled Liquidation
Payments
Amount Paid on Deficit Amount on Total Payments
this this through this
Distribution Date Distribution Date Distribution Date
<S> <C> <C> <C>
Series 2003-1, $0.00 $0.00 $0.00
Subseries 3
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<CAPTION>
6. Information Concerning the Series Interest Funding Account
("SIFA")
Deposits into the SIFA SIFA
on this Distribution Date Balance
<S> <C> <C>
Series 2003-1, Subseries 3 $1,344,693.58 $0.00
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7. Pool Factors for March, 2005
<S> <C>
Class A 1.00000000
Class B 1.00000000
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8.Investor Charged-Off Amount
Cumulative Investor
March, 2005 Charged-Off Amount
<S> <C> <C>
(a) Group One $140,116,911.58 $0.00
(b) Series 2003-1, Subseries 3 $2,725,031.44 $0.00
(c) Class A $2,588,771.38 $0.00
Class B $136,260.06 $0.00
(d) As an annualized percentage of
Principal Receivables at the
beginning of March, 2005 6.21% N/A
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9.Investor Losses for March, 2005
Per $1,000 of Initial
Total Series Investor Interest
<S> <C> <C>
(a) Group One $0.00 $0.00
(b) Series 2003-1, Subseries 3 $0.00 $0.00
(c) Class A $0.00 $0.00
Class B $0.00 $0.00
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<CAPTION>
10. Reimbursement of Investor Losses for March, 2005
Per $1,000 of Initial
Total Series Investor Interest
<S> <C> <C>
(a) Group One $0.00 $0.00
(b) Series 2003-1, Subseries 3 $0.00 $0.00
(c) Class A $0.00 $0.00
Class B $0.00 $0.00
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<CAPTION>
11. Aggregate Amount of Unreimbursed Investor Losses for March,
2005
Per $1,000 of Initial
Total Series Investor Interest
<S&
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